<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cb0c4-b152-7d43-b106-220f52500ed9,g:50e38865-8b47-4f38-953c-c0229248a755-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.conocophillips.com/role/Cover" xlink:type="simple" xlink:href="cop-20260331.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsLineItems_019cb0c4-b425-76c5-9a94-67d6d9a6e763" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityListingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsTable_019cb0c4-b425-7fba-8986-6585e6a265bb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityListingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityListingsLineItems_019cb0c4-b425-76c5-9a94-67d6d9a6e763" xlink:to="loc_dei_EntityListingsTable_019cb0c4-b425-7fba-8986-6585e6a265bb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cb0c4-b425-7a1b-9b70-d922641f02ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntityListingsTable_019cb0c4-b425-7fba-8986-6585e6a265bb" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cb0c4-b425-7a1b-9b70-d922641f02ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7a1b-9b70-d922641f02ca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb0c4-b425-7a1b-9b70-d922641f02ca" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7a1b-9b70-d922641f02ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7018-9ef6-136cc11d1d1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cb0c4-b425-7a1b-9b70-d922641f02ca" xlink:to="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7018-9ef6-136cc11d1d1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cb0c4-b425-7513-885c-80cd4516b803" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7018-9ef6-136cc11d1d1b" xlink:to="loc_us-gaap_CommonStockMember_019cb0c4-b425-7513-885c-80cd4516b803" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_SevenPercentDebenturesDueTwentyTwentyNineMember_019cb0c4-b425-7b30-809a-874c822f212e" xlink:href="cop-20260331.xsd#cop_SevenPercentDebenturesDueTwentyTwentyNineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cb0c4-b425-7018-9ef6-136cc11d1d1b" xlink:to="loc_cop_SevenPercentDebenturesDueTwentyTwentyNineMember_019cb0c4-b425-7b30-809a-874c822f212e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019cb0c4-b425-7a4b-b5b8-a2b56cdf79c2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_019cb0c4-b425-76c5-9a94-67d6d9a6e763" xlink:to="loc_dei_Security12bTitle_019cb0c4-b425-7a4b-b5b8-a2b56cdf79c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019cb0c4-b425-7b26-971c-2cbc567d01b8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_019cb0c4-b425-76c5-9a94-67d6d9a6e763" xlink:to="loc_dei_TradingSymbol_019cb0c4-b425-7b26-971c-2cbc567d01b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019cb0c4-b425-7454-988e-313be6e1fba9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityListingsLineItems_019cb0c4-b425-76c5-9a94-67d6d9a6e763" xlink:to="loc_dei_SecurityExchangeName_019cb0c4-b425-7454-988e-313be6e1fba9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/InvestmentsandLongTermReceivablesNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#InvestmentsandLongTermReceivablesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/InvestmentsandLongTermReceivablesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cb0c4-b426-7a06-972a-b8ac134e96bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cb0c4-b426-7a06-972a-b8ac134e96bb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-773b-8bcb-49b2afb0945c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cb0c4-b426-7a06-972a-b8ac134e96bb" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-773b-8bcb-49b2afb0945c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-773b-8bcb-49b2afb0945c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-773b-8bcb-49b2afb0945c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-773b-8bcb-49b2afb0945c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-773b-8bcb-49b2afb0945c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AustraliaPacificAplngMember_019cb0c4-b426-74cc-a761-2b91b5a32dc5" xlink:href="cop-20260331.xsd#cop_AustraliaPacificAplngMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_AustraliaPacificAplngMember_019cb0c4-b426-74cc-a761-2b91b5a32dc5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_PortArthurLNGMember_019cb0c4-b426-7a63-b9f7-3e73e01e3880" xlink:href="cop-20260331.xsd#cop_PortArthurLNGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_PortArthurLNGMember_019cb0c4-b426-7a63-b9f7-3e73e01e3880" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarEnergyLNGN3Member_019cb0c4-b426-779e-a357-b5af82336cae" xlink:href="cop-20260331.xsd#cop_QatarEnergyLNGN3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_QatarEnergyLNGN3Member_019cb0c4-b426-779e-a357-b5af82336cae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarEnergyLNGNFE4Member_019cb0c4-b426-7563-86a3-808963489df5" xlink:href="cop-20260331.xsd#cop_QatarEnergyLNGNFE4Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_QatarEnergyLNGNFE4Member_019cb0c4-b426-7563-86a3-808963489df5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarEnergyLNGNFS3Member_019cb0c4-b426-751c-9b59-227761a194bc" xlink:href="cop-20260331.xsd#cop_QatarEnergyLNGNFS3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_QatarEnergyLNGNFS3Member_019cb0c4-b426-751c-9b59-227761a194bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarLiquifiedGasCompanyMember_019cb0c4-b426-7e2d-9f5d-038e1978c687" xlink:href="cop-20260331.xsd#cop_QatarLiquifiedGasCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-743f-8621-7db9b8d81116" xlink:to="loc_cop_QatarLiquifiedGasCompanyMember_019cb0c4-b426-7e2d-9f5d-038e1978c687" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cb0c4-b426-71a8-b92e-269dfd804aba" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_019cb0c4-b426-7a06-972a-b8ac134e96bb" xlink:to="loc_dei_LegalEntityAxis_019cb0c4-b426-71a8-b92e-269dfd804aba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cb0c4-b426-71a8-b92e-269dfd804aba_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019cb0c4-b426-71a8-b92e-269dfd804aba" xlink:to="loc_dei_EntityDomain_019cb0c4-b426-71a8-b92e-269dfd804aba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cb0c4-b426-74f8-bd33-c3a97c642a48" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019cb0c4-b426-71a8-b92e-269dfd804aba" xlink:to="loc_dei_EntityDomain_019cb0c4-b426-74f8-bd33-c3a97c642a48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarEnergyMember_019cb0c4-b426-756a-a536-cf918a0041ef" xlink:href="cop-20260331.xsd#cop_QatarEnergyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cb0c4-b426-74f8-bd33-c3a97c642a48" xlink:to="loc_cop_QatarEnergyMember_019cb0c4-b426-756a-a536-cf918a0041ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_MitsuiCoLtdMember_019cb0c4-b426-76b1-b8f3-80b1698b40ac" xlink:href="cop-20260331.xsd#cop_MitsuiCoLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cb0c4-b426-74f8-bd33-c3a97c642a48" xlink:to="loc_cop_MitsuiCoLtdMember_019cb0c4-b426-76b1-b8f3-80b1698b40ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_ChinaNationalPetroleumCorporationMember_019cb0c4-b426-79d2-af7b-f473c3ce495a" xlink:href="cop-20260331.xsd#cop_ChinaNationalPetroleumCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cb0c4-b426-74f8-bd33-c3a97c642a48" xlink:to="loc_cop_ChinaNationalPetroleumCorporationMember_019cb0c4-b426-79d2-af7b-f473c3ce495a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb0c4-b426-776e-8556-52ea455d28ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb0c4-b426-776e-8556-52ea455d28ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_LineOfCreditFacilityValueOutstanding_019cb0c4-b426-7eb4-a27d-69d1a64bde57" xlink:href="cop-20260331.xsd#cop_LineOfCreditFacilityValueOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:to="loc_cop_LineOfCreditFacilityValueOutstanding_019cb0c4-b426-7eb4-a27d-69d1a64bde57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019cb0c4-b426-76c7-9564-fcd3c5a3aab3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:to="loc_us-gaap_EquityMethodInvestments_019cb0c4-b426-76c7-9564-fcd3c5a3aab3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_InvestmentOwnershipPercentage_019cb0c4-b426-79ae-937d-9c0c67a65b91" xlink:href="cop-20260331.xsd#cop_InvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_019cb0c4-b426-7632-a8e9-0cc6a05bd5a2" xlink:to="loc_cop_InvestmentOwnershipPercentage_019cb0c4-b426-79ae-937d-9c0c67a65b91" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019db0a5-ddc2-7684-b72f-af8e64184dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:to="loc_us-gaap_DebtInstrumentTable_019db0a5-ddc2-7684-b72f-af8e64184dd6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019db0a5-ddc2-76bc-babe-111be652ad05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019db0a5-ddc2-7684-b72f-af8e64184dd6" xlink:to="loc_us-gaap_DebtInstrumentAxis_019db0a5-ddc2-76bc-babe-111be652ad05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db0a5-ddc2-76bc-babe-111be652ad05_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db0a5-ddc2-76bc-babe-111be652ad05" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db0a5-ddc2-76bc-babe-111be652ad05_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db0a5-ddc2-76db-b598-df43a79f69fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db0a5-ddc2-76bc-babe-111be652ad05" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db0a5-ddc2-76db-b598-df43a79f69fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_A6875DebenturesDue2026Member_019db0a5-ddc2-77b3-b526-3f9b191dc841" xlink:href="cop-20260331.xsd#cop_A6875DebenturesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019db0a5-ddc2-76db-b598-df43a79f69fb" xlink:to="loc_cop_A6875DebenturesDue2026Member_019db0a5-ddc2-77b3-b526-3f9b191dc841" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019db0a5-ddc2-7d33-b808-083a8ebe314e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019db0a5-ddc2-7684-b72f-af8e64184dd6" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019db0a5-ddc2-7d33-b808-083a8ebe314e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-7d33-b808-083a8ebe314e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db0a5-ddc2-7d33-b808-083a8ebe314e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-7d33-b808-083a8ebe314e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-76e7-9cc1-75c67a8b73a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db0a5-ddc2-7d33-b808-083a8ebe314e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-76e7-9cc1-75c67a8b73a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019db0a5-ddc2-768d-850c-8d6535284c81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-76e7-9cc1-75c67a8b73a9" xlink:to="loc_us-gaap_UnsecuredDebtMember_019db0a5-ddc2-768d-850c-8d6535284c81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_VariableRateDebtBondsMember_019db0a5-ddc2-7788-94b9-9bb7a7c32114" xlink:href="cop-20260331.xsd#cop_VariableRateDebtBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019db0a5-ddc2-76e7-9cc1-75c67a8b73a9" xlink:to="loc_cop_VariableRateDebtBondsMember_019db0a5-ddc2-7788-94b9-9bb7a7c32114" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019db0a5-ddc2-7cf5-b11f-61dac57f73d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019db0a5-ddc2-7cf5-b11f-61dac57f73d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount_019db0a5-ddc2-788f-81d1-2921cf7a9481" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAmount_019db0a5-ddc2-788f-81d1-2921cf7a9481" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019db0a5-ddc2-7db3-8f17-c17790249f09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019db0a5-ddc2-7db3-8f17-c17790249f09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019db0a5-ddc2-77e0-82e6-dfabe5872edb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019db0a5-ddc2-7162-9682-f0ede1afba65" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019db0a5-ddc2-77e0-82e6-dfabe5872edb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/GuaranteesNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#GuaranteesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/GuaranteesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_019db0aa-4fad-74c8-8712-a819932bde0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_019db0aa-4fad-74c8-8712-a819932bde0f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019db0aa-4fad-740e-86d4-c719663cabf1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_019db0aa-4fad-74c8-8712-a819932bde0f" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019db0aa-4fad-740e-86d4-c719663cabf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-740e-86d4-c719663cabf1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019db0aa-4fad-740e-86d4-c719663cabf1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-740e-86d4-c719663cabf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-7a02-a001-70d8dd6f8341" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019db0aa-4fad-740e-86d4-c719663cabf1" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-7a02-a001-70d8dd6f8341" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AustraliaPacificAplngMember_019db0aa-4fad-709c-b19c-5ff670c29a9e" xlink:href="cop-20260331.xsd#cop_AustraliaPacificAplngMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-7a02-a001-70d8dd6f8341" xlink:to="loc_cop_AustraliaPacificAplngMember_019db0aa-4fad-709c-b19c-5ff670c29a9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_QatarEnergyLNGNFEAndQatarEnergyLNGNFS3Member_019db0ab-96ea-7f30-b8bc-c94d58c93a49" xlink:href="cop-20260331.xsd#cop_QatarEnergyLNGNFEAndQatarEnergyLNGNFS3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-7a02-a001-70d8dd6f8341" xlink:to="loc_cop_QatarEnergyLNGNFEAndQatarEnergyLNGNFS3Member_019db0ab-96ea-7f30-b8bc-c94d58c93a49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_EquatorialGuineaGuranteesMember_019db0ab-c79e-7467-b973-04a623e085d6" xlink:href="cop-20260331.xsd#cop_EquatorialGuineaGuranteesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019db0aa-4fad-7a02-a001-70d8dd6f8341" xlink:to="loc_cop_EquatorialGuineaGuranteesMember_019db0ab-c79e-7467-b973-04a623e085d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019db0aa-4fad-710e-b457-8129f0f60552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_019db0aa-4fad-74c8-8712-a819932bde0f" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019db0aa-4fad-710e-b457-8129f0f60552" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-710e-b457-8129f0f60552_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019db0aa-4fad-710e-b457-8129f0f60552" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-710e-b457-8129f0f60552_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019db0aa-4fad-710e-b457-8129f0f60552" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_FinanceReserveGuaranteeMember_019db0aa-4fad-7c83-accd-c2642f558096" xlink:href="cop-20260331.xsd#cop_FinanceReserveGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:to="loc_cop_FinanceReserveGuaranteeMember_019db0aa-4fad-7c83-accd-c2642f558096" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_JointVentureObligationGuaranteeMember_019db0ab-96ea-719b-9b63-5de2f3e616cb" xlink:href="cop-20260331.xsd#cop_JointVentureObligationGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:to="loc_cop_JointVentureObligationGuaranteeMember_019db0ab-96ea-719b-9b63-5de2f3e616cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentGuaranteeMember_019db0ab-c79e-74b3-aaaf-7cfad934b9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:to="loc_us-gaap_PaymentGuaranteeMember_019db0ab-c79e-74b3-aaaf-7cfad934b9c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OtherGuaranteesMember_019db0ab-f229-749d-b15e-619379f6da84" xlink:href="cop-20260331.xsd#cop_OtherGuaranteesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:to="loc_cop_OtherGuaranteesMember_019db0ab-f229-749d-b15e-619379f6da84" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndemnificationGuaranteeMember_019db0ab-f229-7f08-8852-afc9c0994e17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndemnificationGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019db0aa-4fad-7025-9eb3-e21f7be96504" xlink:to="loc_us-gaap_IndemnificationGuaranteeMember_019db0ab-f229-7f08-8852-afc9c0994e17" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019db0aa-4fad-7f88-872f-77638607b4b0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGuaranteeObligationsTable_019db0aa-4fad-74c8-8712-a819932bde0f" xlink:to="loc_srt_RangeAxis_019db0aa-4fad-7f88-872f-77638607b4b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019db0aa-4fad-7f88-872f-77638607b4b0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019db0aa-4fad-7f88-872f-77638607b4b0" xlink:to="loc_srt_RangeMember_019db0aa-4fad-7f88-872f-77638607b4b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019db0aa-4fad-7b57-9c82-4fcba3bd4be6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019db0aa-4fad-7f88-872f-77638607b4b0" xlink:to="loc_srt_RangeMember_019db0aa-4fad-7b57-9c82-4fcba3bd4be6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019db0ab-212a-7a1f-bfbd-10a53224dc94" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019db0aa-4fad-7b57-9c82-4fcba3bd4be6" xlink:to="loc_srt_MinimumMember_019db0ab-212a-7a1f-bfbd-10a53224dc94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019db0aa-4fad-79e8-998d-3817cba27020" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019db0aa-4fad-7b57-9c82-4fcba3bd4be6" xlink:to="loc_srt_MaximumMember_019db0aa-4fad-79e8-998d-3817cba27020" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_GuarantorObligationsRemainingTerm_019db0aa-4fad-71e2-b172-ee4621041fee" xlink:href="cop-20260331.xsd#cop_GuarantorObligationsRemainingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_cop_GuarantorObligationsRemainingTerm_019db0aa-4fad-71e2-b172-ee4621041fee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_GuaranteeObligationsRemainingTerm_019db0aa-4fad-763c-ac0a-86db077722ca" xlink:href="cop-20260331.xsd#cop_GuaranteeObligationsRemainingTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_cop_GuaranteeObligationsRemainingTerm_019db0aa-4fad-763c-ac0a-86db077722ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_019db0aa-8c85-7c3c-91e7-5cabe8aa9b35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_019db0aa-8c85-7c3c-91e7-5cabe8aa9b35" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019db0ab-6c7d-7971-a036-419215348f39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019db0ab-6c7d-7971-a036-419215348f39" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_GuarantorObligationsTerm_019db0ab-96ea-70cf-8cbe-d2876d4abad8" xlink:href="cop-20260331.xsd#cop_GuarantorObligationsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsLineItems_019db0aa-4fad-7c25-a030-d7e89c6d1dee" xlink:to="loc_cop_GuarantorObligationsTerm_019db0ab-96ea-70cf-8cbe-d2876d4abad8" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/ContingenciesCommitmentsandAccruedEnvironmentalCostsNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#ContingenciesCommitmentsandAccruedEnvironmentalCostsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/ContingenciesCommitmentsandAccruedEnvironmentalCostsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019cb0c4-b426-7f42-805d-7a8399c32b0b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:to="loc_srt_StatementGeographicalAxis_019cb0c4-b426-7f42-805d-7a8399c32b0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7f42-805d-7a8399c32b0b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019cb0c4-b426-7f42-805d-7a8399c32b0b" xlink:to="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7f42-805d-7a8399c32b0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7d86-95cb-72ce8b49bf3e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019cb0c4-b426-7f42-805d-7a8399c32b0b" xlink:to="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7d86-95cb-72ce8b49bf3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_UnitedStatesAndCanadaMember_019cb0c4-b426-7aef-a42d-ff72ac4d6099" xlink:href="cop-20260331.xsd#cop_UnitedStatesAndCanadaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7d86-95cb-72ce8b49bf3e" xlink:to="loc_cop_UnitedStatesAndCanadaMember_019cb0c4-b426-7aef-a42d-ff72ac4d6099" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_VE_019cb0c4-b426-7db7-8dd2-9cc3818a5377" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_VE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019cb0c4-b426-7d86-95cb-72ce8b49bf3e" xlink:to="loc_country_VE_019cb0c4-b426-7db7-8dd2-9cc3818a5377" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019cb0c4-b426-722c-a341-3cb0b182ac50" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:to="loc_srt_LitigationCaseAxis_019cb0c4-b426-722c-a341-3cb0b182ac50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-722c-a341-3cb0b182ac50_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019cb0c4-b426-722c-a341-3cb0b182ac50" xlink:to="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-722c-a341-3cb0b182ac50_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-75c5-a6ca-4f23e049b688" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019cb0c4-b426-722c-a341-3cb0b182ac50" xlink:to="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-75c5-a6ca-4f23e049b688" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_ConocoPhillipsVersusPetroleosDeVenezuelaMember_019cb0c4-b426-77bf-be95-decb58736f13" xlink:href="cop-20260331.xsd#cop_ConocoPhillipsVersusPetroleosDeVenezuelaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-75c5-a6ca-4f23e049b688" xlink:to="loc_cop_ConocoPhillipsVersusPetroleosDeVenezuelaMember_019cb0c4-b426-77bf-be95-decb58736f13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_ConocoPhillipsVersusPetroleosDeVenezuela2Member_019cb0c4-b426-7433-a5c5-18d074694be1" xlink:href="cop-20260331.xsd#cop_ConocoPhillipsVersusPetroleosDeVenezuela2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-75c5-a6ca-4f23e049b688" xlink:to="loc_cop_ConocoPhillipsVersusPetroleosDeVenezuela2Member_019cb0c4-b426-7433-a5c5-18d074694be1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OuterContinentalShelfLeaseMember_019cb0c4-b426-74fe-bf54-c174d1b702e2" xlink:href="cop-20260331.xsd#cop_OuterContinentalShelfLeaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019cb0c4-b426-75c5-a6ca-4f23e049b688" xlink:to="loc_cop_OuterContinentalShelfLeaseMember_019cb0c4-b426-74fe-bf54-c174d1b702e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019cb0c4-b426-7b2d-b97f-aad98c0eef1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EnvironmentalRemediationContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019cb0c4-b426-7b2d-b97f-aad98c0eef1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019cb0c4-b426-7b2d-b97f-aad98c0eef1c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019cb0c4-b426-7b2d-b97f-aad98c0eef1c" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019cb0c4-b426-7b2d-b97f-aad98c0eef1c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019cb0c4-b426-7953-b372-83f8ea192a36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019cb0c4-b426-7b2d-b97f-aad98c0eef1c" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019cb0c4-b426-7953-b372-83f8ea192a36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CleanupRemediationActivitiesMember_019cb0c4-b426-7989-aa1b-c645fca02121" xlink:href="cop-20260331.xsd#cop_CleanupRemediationActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019cb0c4-b426-7953-b372-83f8ea192a36" xlink:to="loc_cop_CleanupRemediationActivitiesMember_019cb0c4-b426-7989-aa1b-c645fca02121" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-733f-acbe-e21c19c3e7e9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019cb0c4-b426-738e-99ec-54acb6828163" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-733f-acbe-e21c19c3e7e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-733f-acbe-e21c19c3e7e9_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-733f-acbe-e21c19c3e7e9" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-733f-acbe-e21c19c3e7e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-7945-bd83-81dee0c81adb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cb0c4-b426-733f-acbe-e21c19c3e7e9" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-7945-bd83-81dee0c81adb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_PhillipsPetroleumCompanyMember_019cb0c4-b426-7dcd-b627-2c53be8a2613" xlink:href="cop-20260331.xsd#cop_PhillipsPetroleumCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cb0c4-b426-7945-bd83-81dee0c81adb" xlink:to="loc_cop_PhillipsPetroleumCompanyMember_019cb0c4-b426-7dcd-b627-2c53be8a2613" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingencies_019cb0c4-b426-7be9-a781-c5ee9bd03570" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccrualForEnvironmentalLossContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingencies_019cb0c4-b426-7be9-a781-c5ee9bd03570" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_EnvironmentalLossContingenciesTerm_019cb0c4-b426-76b1-ac80-d9f5f6c468be" xlink:href="cop-20260331.xsd#cop_EnvironmentalLossContingenciesTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_EnvironmentalLossContingenciesTerm_019cb0c4-b426-76b1-ac80-d9f5f6c468be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_019cb0c4-b426-713d-9044-874a0d7ab044" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_us-gaap_PurchaseObligation_019cb0c4-b426-713d-9044-874a0d7ab044" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_019cb0c4-b426-7e42-a346-a3f0cdd87cd1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationSettlementAmountAwardedFromOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_019cb0c4-b426-7e42-a346-a3f0cdd87cd1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_LitigationSettlementAmountAwardedFromOtherPartyRevised_019cb0c4-b426-7ef7-9719-efd54679b464" xlink:href="cop-20260331.xsd#cop_LitigationSettlementAmountAwardedFromOtherPartyRevised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_LitigationSettlementAmountAwardedFromOtherPartyRevised_019cb0c4-b426-7ef7-9719-efd54679b464" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_NumberOfAffiliates_019cb0c4-b426-7756-8814-b9290124dede" xlink:href="cop-20260331.xsd#cop_NumberOfAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_NumberOfAffiliates_019cb0c4-b426-7756-8814-b9290124dede" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_NumberOfOngoingAwards_019cb0c4-b426-7f1a-8227-cc4e6c780d1c" xlink:href="cop-20260331.xsd#cop_NumberOfOngoingAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_NumberOfOngoingAwards_019cb0c4-b426-7f1a-8227-cc4e6c780d1c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_ProceedsFromLegalSettlementsToDate_019cb0c4-b426-7d43-a7ec-ed15e51b3ddc" xlink:href="cop-20260331.xsd#cop_ProceedsFromLegalSettlementsToDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_ProceedsFromLegalSettlementsToDate_019cb0c4-b426-7d43-a7ec-ed15e51b3ddc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb0c4-b426-7ffb-8547-1052ca0c25d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cb0c4-b426-7ffb-8547-1052ca0c25d7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_SaleOfInterestDuration_019cb0c4-b426-78b5-be16-be1355de0e63" xlink:href="cop-20260331.xsd#cop_SaleOfInterestDuration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019cb0c4-b426-78e1-8d51-b3693d86fdd6" xlink:to="loc_cop_SaleOfInterestDuration_019cb0c4-b426-78b5-be16-be1355de0e63" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofBalanceSheetLocationandFairValueAmountsofDerivativesDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofBalanceSheetLocationandFairValueAmountsofDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofBalanceSheetLocationandFairValueAmountsofDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019cb0c4-b426-78a4-a1c9-f2be71eddbb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-79a7-ad18-aa6a72f1bbb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cb0c4-b426-78a4-a1c9-f2be71eddbb3" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-79a7-ad18-aa6a72f1bbb3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cb0c4-b426-71df-ad95-f46bed23c765" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-79a7-ad18-aa6a72f1bbb3" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cb0c4-b426-71df-ad95-f46bed23c765" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-71df-ad95-f46bed23c765_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb0c4-b426-71df-ad95-f46bed23c765" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-71df-ad95-f46bed23c765_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cb0c4-b426-71df-ad95-f46bed23c765" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_019cb0c4-b426-74ea-8ceb-b03c1db20127" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_019cb0c4-b426-74ea-8ceb-b03c1db20127" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMember_019cb0c4-b426-747c-acd5-fe066cae9b0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:to="loc_us-gaap_OtherAssetsMember_019cb0c4-b426-747c-acd5-fe066cae9b0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OtherAccrualsMember_019cb0c4-b426-72ca-bfe2-7223c2c27e57" xlink:href="cop-20260331.xsd#cop_OtherAccrualsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:to="loc_cop_OtherAccrualsMember_019cb0c4-b426-72ca-bfe2-7223c2c27e57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesMember_019cb0c4-b426-7dc0-b368-30b1e3ae982a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cb0c4-b426-79c2-9d2d-408a78f9cf71" xlink:to="loc_us-gaap_OtherLiabilitiesMember_019cb0c4-b426-7dc0-b368-30b1e3ae982a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7e9c-b7e0-04eb0c868757" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-79a7-ad18-aa6a72f1bbb3" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7e9c-b7e0-04eb0c868757" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7e9c-b7e0-04eb0c868757_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7e9c-b7e0-04eb0c868757" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7e9c-b7e0-04eb0c868757_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7a48-ae87-9ca9191a5d29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7e9c-b7e0-04eb0c868757" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7a48-ae87-9ca9191a5d29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cb0c4-b426-791d-a7e8-4b0d7494fa62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7a48-ae87-9ca9191a5d29" xlink:to="loc_us-gaap_CommodityContractMember_019cb0c4-b426-791d-a7e8-4b0d7494fa62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_019cb0c4-b426-7699-a05c-7cbd4eeb76a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cb0c4-b426-78a4-a1c9-f2be71eddbb3" xlink:to="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue_019cb0c4-b426-7699-a05c-7cbd4eeb76a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_019cb0c4-b426-7ac6-9b43-1f090059f2f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cb0c4-b426-78a4-a1c9-f2be71eddbb3" xlink:to="loc_us-gaap_PriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_019cb0c4-b426-7ac6-9b43-1f090059f2f2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofIncomeStatementLocationandGainLossAmountsofDerivativesDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofIncomeStatementLocationandGainLossAmountsofDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofIncomeStatementLocationandGainLossAmountsofDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cb0c4-b426-7196-8d1d-7a3694e41bd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cb0c4-b426-70ad-941b-48f7da2c5a21" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cb0c4-b426-7196-8d1d-7a3694e41bd6" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cb0c4-b426-70ad-941b-48f7da2c5a21" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019cb0c4-b426-7393-88dc-e925d9016990" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cb0c4-b426-70ad-941b-48f7da2c5a21" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019cb0c4-b426-7393-88dc-e925d9016990" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-7393-88dc-e925d9016990_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb0c4-b426-7393-88dc-e925d9016990" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-7393-88dc-e925d9016990_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-797e-aaa0-449d31983916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019cb0c4-b426-7393-88dc-e925d9016990" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-797e-aaa0-449d31983916" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesMember_019cb0c4-b426-79ec-ad2b-afbb05b2799e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-797e-aaa0-449d31983916" xlink:to="loc_us-gaap_SalesMember_019cb0c4-b426-79ec-ad2b-afbb05b2799e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncomeMember_019cb0c4-b426-78d5-b3b6-c5ee75e58d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-797e-aaa0-449d31983916" xlink:to="loc_us-gaap_OtherIncomeMember_019cb0c4-b426-78d5-b3b6-c5ee75e58d8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019cb0c4-b426-7286-a065-a3d782a87491" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019cb0c4-b426-797e-aaa0-449d31983916" xlink:to="loc_us-gaap_CostOfSalesMember_019cb0c4-b426-7286-a065-a3d782a87491" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-70e7-9d8d-1d073cd88c5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cb0c4-b426-70ad-941b-48f7da2c5a21" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-70e7-9d8d-1d073cd88c5b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-70e7-9d8d-1d073cd88c5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-70e7-9d8d-1d073cd88c5b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-70e7-9d8d-1d073cd88c5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-769d-a7b7-1d524396339c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-70e7-9d8d-1d073cd88c5b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-769d-a7b7-1d524396339c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cb0c4-b426-7814-9c60-32af281299d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-769d-a7b7-1d524396339c" xlink:to="loc_us-gaap_CommodityContractMember_019cb0c4-b426-7814-9c60-32af281299d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019cb0c4-b426-70ac-93fa-179a1963bbf5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cb0c4-b426-7196-8d1d-7a3694e41bd6" xlink:to="loc_us-gaap_GainLossOnPriceRiskDerivativeInstrumentsNotDesignatedAsHedgingInstruments_019cb0c4-b426-70ac-93fa-179a1963bbf5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofNetExposuresfromOutstandingCommodityDerivativeContractsDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofNetExposuresfromOutstandingCommodityDerivativeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofNetExposuresfromOutstandingCommodityDerivativeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingActivityGainsAndLossesLineItems_019cb0c4-b426-7f83-aec8-2451dfef77ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradingActivityGainsAndLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradingActivitiesGainLossByTypeTable_019cb0c4-b426-745e-a75e-0b9f8ed8ae37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TradingActivitiesGainLossByTypeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TradingActivityGainsAndLossesLineItems_019cb0c4-b426-7f83-aec8-2451dfef77ba" xlink:to="loc_us-gaap_TradingActivitiesGainLossByTypeTable_019cb0c4-b426-745e-a75e-0b9f8ed8ae37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019cb0c4-b426-71ff-9a0b-af1588997229" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReserveQuantitiesByTypeOfReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TradingActivitiesGainLossByTypeTable_019cb0c4-b426-745e-a75e-0b9f8ed8ae37" xlink:to="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019cb0c4-b426-71ff-9a0b-af1588997229" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TypeOfReserveDomain_019cb0c4-b426-71ff-9a0b-af1588997229_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TypeOfReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019cb0c4-b426-71ff-9a0b-af1588997229" xlink:to="loc_srt_TypeOfReserveDomain_019cb0c4-b426-71ff-9a0b-af1588997229_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TypeOfReserveDomain_019cb0c4-b426-7aa4-ab9f-85e8bf5bfcb2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TypeOfReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019cb0c4-b426-71ff-9a0b-af1588997229" xlink:to="loc_srt_TypeOfReserveDomain_019cb0c4-b426-7aa4-ab9f-85e8bf5bfcb2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_NaturalGasPowerAndCarbonDioxideEmissionsFlatPriceMember_019cb0c4-b426-7837-9a7c-d29069e5b541" xlink:href="cop-20260331.xsd#cop_NaturalGasPowerAndCarbonDioxideEmissionsFlatPriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TypeOfReserveDomain_019cb0c4-b426-7aa4-ab9f-85e8bf5bfcb2" xlink:to="loc_cop_NaturalGasPowerAndCarbonDioxideEmissionsFlatPriceMember_019cb0c4-b426-7837-9a7c-d29069e5b541" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_NaturalGasPowerAndCarbonDioxideEmissionsBasisMember_019cb0c4-b426-747c-be2b-8f43a82d2b31" xlink:href="cop-20260331.xsd#cop_NaturalGasPowerAndCarbonDioxideEmissionsBasisMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TypeOfReserveDomain_019cb0c4-b426-7aa4-ab9f-85e8bf5bfcb2" xlink:to="loc_cop_NaturalGasPowerAndCarbonDioxideEmissionsBasisMember_019cb0c4-b426-747c-be2b-8f43a82d2b31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TradingActivitiesGainLossByTypeTable_019cb0c4-b426-745e-a75e-0b9f8ed8ae37" xlink:to="loc_us-gaap_PositionAxis_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2" xlink:to="loc_us-gaap_PositionDomain_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019cb0c4-b426-71ab-92bc-ca85eec49f25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019cb0c4-b426-7cc2-bc86-fc0dbdade1c2" xlink:to="loc_us-gaap_PositionDomain_019cb0c4-b426-71ab-92bc-ca85eec49f25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019cb0c4-b426-7433-8ddf-ba1bc366df13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019cb0c4-b426-71ab-92bc-ca85eec49f25" xlink:to="loc_us-gaap_ShortMember_019cb0c4-b426-7433-8ddf-ba1bc366df13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f67-aa39-626f12316a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TradingActivitiesGainLossByTypeTable_019cb0c4-b426-745e-a75e-0b9f8ed8ae37" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f67-aa39-626f12316a0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f67-aa39-626f12316a0b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f67-aa39-626f12316a0b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f67-aa39-626f12316a0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fa8-91c7-53ffb607d0fd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f67-aa39-626f12316a0b" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fa8-91c7-53ffb607d0fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cb0c4-b426-71bb-81c0-92abbdf540ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fa8-91c7-53ffb607d0fd" xlink:to="loc_us-gaap_CommodityContractMember_019cb0c4-b426-71bb-81c0-92abbdf540ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_019cb0c4-b426-7d43-9046-1e8b4cc602e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TradingActivityGainsAndLossesLineItems_019cb0c4-b426-7f83-aec8-2451dfef77ba" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_019cb0c4-b426-7d43-9046-1e8b4cc602e1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019cb0c4-b426-7e3c-9317-656a57bfb019" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_DerivativeTable_019cb0c4-b426-7e3c-9317-656a57bfb019" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb0c4-b426-7aee-90fb-640dc30f5041" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019cb0c4-b426-7e3c-9317-656a57bfb019" xlink:to="loc_srt_RangeAxis_019cb0c4-b426-7aee-90fb-640dc30f5041" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb0c4-b426-7aee-90fb-640dc30f5041_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb0c4-b426-7aee-90fb-640dc30f5041" xlink:to="loc_srt_RangeMember_019cb0c4-b426-7aee-90fb-640dc30f5041_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb0c4-b426-7ec4-bb71-8019e79a3547" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb0c4-b426-7aee-90fb-640dc30f5041" xlink:to="loc_srt_RangeMember_019cb0c4-b426-7ec4-bb71-8019e79a3547" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb0c4-b426-7609-a85c-52f27632f258" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb0c4-b426-7ec4-bb71-8019e79a3547" xlink:to="loc_srt_MaximumMember_019cb0c4-b426-7609-a85c-52f27632f258" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb0c4-b426-787d-82a6-68d097250cd3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb0c4-b426-7ec4-bb71-8019e79a3547" xlink:to="loc_srt_MinimumMember_019cb0c4-b426-787d-82a6-68d097250cd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CreditRiskAxis_019cb0c4-b426-72df-be00-3bf9f24e7363" xlink:href="cop-20260331.xsd#cop_CreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019cb0c4-b426-7e3c-9317-656a57bfb019" xlink:to="loc_cop_CreditRiskAxis_019cb0c4-b426-72df-be00-3bf9f24e7363" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CreditRiskDomain_019cb0c4-b426-72df-be00-3bf9f24e7363_default" xlink:href="cop-20260331.xsd#cop_CreditRiskDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cop_CreditRiskAxis_019cb0c4-b426-72df-be00-3bf9f24e7363" xlink:to="loc_cop_CreditRiskDomain_019cb0c4-b426-72df-be00-3bf9f24e7363_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CreditRiskDomain_019cb0c4-b426-7eb6-8945-8bb34777c06e" xlink:href="cop-20260331.xsd#cop_CreditRiskDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cop_CreditRiskAxis_019cb0c4-b426-72df-be00-3bf9f24e7363" xlink:to="loc_cop_CreditRiskDomain_019cb0c4-b426-7eb6-8945-8bb34777c06e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_InEventOfDowngradeBelowInvestmentGradeMember_019cb0c4-b426-7808-8a71-8d491c9a298a" xlink:href="cop-20260331.xsd#cop_InEventOfDowngradeBelowInvestmentGradeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_CreditRiskDomain_019cb0c4-b426-7eb6-8945-8bb34777c06e" xlink:to="loc_cop_InEventOfDowngradeBelowInvestmentGradeMember_019cb0c4-b426-7808-8a71-8d491c9a298a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f5f-b2d4-c37015bcb98e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019cb0c4-b426-7e3c-9317-656a57bfb019" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f5f-b2d4-c37015bcb98e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f5f-b2d4-c37015bcb98e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f5f-b2d4-c37015bcb98e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f5f-b2d4-c37015bcb98e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7ff4-8bbe-5c0cb7094b18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7f5f-b2d4-c37015bcb98e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7ff4-8bbe-5c0cb7094b18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019cb0c4-b426-7a82-9394-23c0f98a1dfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7ff4-8bbe-5c0cb7094b18" xlink:to="loc_us-gaap_InterestRateSwapMember_019cb0c4-b426-7a82-9394-23c0f98a1dfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives_019cb0c4-b426-70f6-a9a6-0c1472d9374d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_PercentageOfDebtHedgedByInterestRateDerivatives_019cb0c4-b426-70f6-a9a6-0c1472d9374d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019cb0c4-b426-735c-bf40-c2d49b0a8653" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019cb0c4-b426-735c-bf40-c2d49b0a8653" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_InvestmentsAndLongTermReceivablesRemainingMaturity_019cb0c4-b426-7eeb-8199-af1df2c0a1da" xlink:href="cop-20260331.xsd#cop_InvestmentsAndLongTermReceivablesRemainingMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_cop_InvestmentsAndLongTermReceivablesRemainingMaturity_019cb0c4-b426-7eeb-8199-af1df2c0a1da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_019cb0c4-b426-71e2-a898-f5a4f13094ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities_019cb0c4-b426-71e2-a898-f5a4f13094ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019cb0c4-b426-70a9-b994-a92923771c39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNetLiabilityPositionAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019cb0c4-b426-70a9-b994-a92923771c39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019cb0c4-b426-73de-b91b-221c958adaec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019cb0c4-b426-73de-b91b-221c958adaec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalCollateralAggregateFairValue_019cb0c4-b426-71fb-9f60-5d4108b3653a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalCollateralAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019cb0c4-b426-7958-b11d-809a07d3e287" xlink:to="loc_us-gaap_AdditionalCollateralAggregateFairValue_019cb0c4-b426-71fb-9f60-5d4108b3653a" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofNetCarryingAmountofHeldtoMaturityInvestmentsDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofNetCarryingAmountofHeldtoMaturityInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofNetCarryingAmountofHeldtoMaturityInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cb0c4-b426-75a9-8f29-36b39cfa887c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cb0c4-b426-7d24-b14c-3c5aa5e63d87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfHeldToMaturitySecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cb0c4-b426-75a9-8f29-36b39cfa887c" xlink:to="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cb0c4-b426-7d24-b14c-3c5aa5e63d87" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_019cb0c4-b426-7082-8e4f-a9359c82979b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cb0c4-b426-7d24-b14c-3c5aa5e63d87" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_019cb0c4-b426-7082-8e4f-a9359c82979b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-7082-8e4f-a9359c82979b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019cb0c4-b426-7082-8e4f-a9359c82979b" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-7082-8e4f-a9359c82979b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_019cb0c4-b426-7082-8e4f-a9359c82979b" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashMember_019cb0c4-b426-7bbf-89a6-1871c1af7c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:to="loc_us-gaap_CashMember_019cb0c4-b426-7bbf-89a6-1871c1af7c9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DemandDepositsMember_019cb0c4-b426-7701-b971-c122d486d7f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DemandDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:to="loc_us-gaap_DemandDepositsMember_019cb0c4-b426-7701-b971-c122d486d7f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_019cb0c4-b426-7d88-bbd8-b49ee84df519" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:to="loc_us-gaap_BankTimeDepositsMember_019cb0c4-b426-7d88-bbd8-b49ee84df519" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-7561-8b19-58e1e0298fad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_019cb0c4-b426-75ae-815f-f9895afed306" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-7561-8b19-58e1e0298fad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7b8e-84cb-a475e6b4907d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesTable_019cb0c4-b426-7d24-b14c-3c5aa5e63d87" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7b8e-84cb-a475e6b4907d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7b8e-84cb-a475e6b4907d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7b8e-84cb-a475e6b4907d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7b8e-84cb-a475e6b4907d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fdd-ba35-560d7875390d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7b8e-84cb-a475e6b4907d" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fdd-ba35-560d7875390d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RemainingMaturities1To90DaysMember_019cb0c4-b426-70ea-8ffd-625310174b43" xlink:href="cop-20260331.xsd#cop_RemainingMaturities1To90DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fdd-ba35-560d7875390d" xlink:to="loc_cop_RemainingMaturities1To90DaysMember_019cb0c4-b426-70ea-8ffd-625310174b43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RemainingMaturities91To180DaysMember_019cb0c4-b426-7468-a931-a7a40a9190a8" xlink:href="cop-20260331.xsd#cop_RemainingMaturities91To180DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fdd-ba35-560d7875390d" xlink:to="loc_cop_RemainingMaturities91To180DaysMember_019cb0c4-b426-7468-a931-a7a40a9190a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RemainingMaturitiesWithinOneYearMember_019cb0c4-b426-7e78-8003-948027052b45" xlink:href="cop-20260331.xsd#cop_RemainingMaturitiesWithinOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7fdd-ba35-560d7875390d" xlink:to="loc_cop_RemainingMaturitiesWithinOneYearMember_019cb0c4-b426-7e78-8003-948027052b45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CashAndCashEquivalentsCarriedAtCostPlusAccruedInterest_019cb0c4-b426-7181-9999-9e7341b800a1" xlink:href="cop-20260331.xsd#cop_CashAndCashEquivalentsCarriedAtCostPlusAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cb0c4-b426-75a9-8f29-36b39cfa887c" xlink:to="loc_cop_CashAndCashEquivalentsCarriedAtCostPlusAccruedInterest_019cb0c4-b426-7181-9999-9e7341b800a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_ShortTermInvestmentsCarriedAtCostPlusAccruedInterest_019cb0c4-b426-7d82-aa9d-ad422e520523" xlink:href="cop-20260331.xsd#cop_ShortTermInvestmentsCarriedAtCostPlusAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfHeldToMaturitySecuritiesLineItems_019cb0c4-b426-75a9-8f29-36b39cfa887c" xlink:to="loc_cop_ShortTermInvestmentsCarriedAtCostPlusAccruedInterest_019cb0c4-b426-7d82-aa9d-ad422e520523" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofDebtSecuritiesCarriedatFairValueDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofDebtSecuritiesCarriedatFairValueDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofDebtSecuritiesCarriedatFairValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7ac4-9702-5d6203c5759c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7e3b-849b-a2fcf9463230" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7ac4-9702-5d6203c5759c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7e3b-849b-a2fcf9463230" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-718e-8c5f-6c1be1cc90ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7e3b-849b-a2fcf9463230" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-718e-8c5f-6c1be1cc90ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-718e-8c5f-6c1be1cc90ac_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-718e-8c5f-6c1be1cc90ac" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-718e-8c5f-6c1be1cc90ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f70-9174-bb435f3bf5ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-718e-8c5f-6c1be1cc90ac" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f70-9174-bb435f3bf5ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RemainingMaturitiesWithinOneYearMember_019cb0c4-b426-7ea2-be1c-2a2300966a89" xlink:href="cop-20260331.xsd#cop_RemainingMaturitiesWithinOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f70-9174-bb435f3bf5ce" xlink:to="loc_cop_RemainingMaturitiesWithinOneYearMember_019cb0c4-b426-7ea2-be1c-2a2300966a89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RemainingMaturitiesGreaterThanOneYearThroughEightYearsMember_019cb0c4-b426-703c-bccd-e506c4ecf9e6" xlink:href="cop-20260331.xsd#cop_RemainingMaturitiesGreaterThanOneYearThroughEightYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7f70-9174-bb435f3bf5ce" xlink:to="loc_cop_RemainingMaturitiesGreaterThanOneYearThroughEightYearsMember_019cb0c4-b426-703c-bccd-e506c4ecf9e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7d4d-b761-f2fac8dcddd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7e3b-849b-a2fcf9463230" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7d4d-b761-f2fac8dcddd0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7d4d-b761-f2fac8dcddd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7d4d-b761-f2fac8dcddd0" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7d4d-b761-f2fac8dcddd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-79f5-aa06-93ded718cc78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7d4d-b761-f2fac8dcddd0" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-79f5-aa06-93ded718cc78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7b16-9a4a-8ec46e6caff4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-79f5-aa06-93ded718cc78" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7b16-9a4a-8ec46e6caff4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb0c4-b426-71c9-b22a-8d735379ff7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7b16-9a4a-8ec46e6caff4" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb0c4-b426-71c9-b22a-8d735379ff7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-740c-91c9-14d4cd188b33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7e3b-849b-a2fcf9463230" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-740c-91c9-14d4cd188b33" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-740c-91c9-14d4cd188b33_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-740c-91c9-14d4cd188b33" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-740c-91c9-14d4cd188b33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-740c-91c9-14d4cd188b33" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cb0c4-b426-7168-9cc5-1f1627c04c57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cb0c4-b426-7168-9cc5-1f1627c04c57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019cb0c4-b426-7451-b16e-3d9090456d93" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_CommercialPaperMember_019cb0c4-b426-7451-b16e-3d9090456d93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-7ac9-b3df-d1908cf5664f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-7ac9-b3df-d1908cf5664f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_019cb0c4-b426-7d05-8c8f-94ac98b99a15" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_019cb0c4-b426-7d05-8c8f-94ac98b99a15" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtMember_019cb0c4-b426-736e-9c86-03b1c2b1c037" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignGovernmentDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_ForeignGovernmentDebtMember_019cb0c4-b426-736e-9c86-03b1c2b1c037" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019cb0c4-b426-775a-84c6-dcdbeee88846" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-78e1-ba5e-a17e2209cab5" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019cb0c4-b426-775a-84c6-dcdbeee88846" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cb0c4-b426-767e-b055-9ec62cbcf856" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7ac4-9702-5d6203c5759c" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019cb0c4-b426-767e-b055-9ec62cbcf856" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_019cb0c4-b426-7f1c-99b7-fef938759cfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7ac4-9702-5d6203c5759c" xlink:to="loc_us-gaap_ShortTermInvestments_019cb0c4-b426-7f1c-99b7-fef938759cfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestmentsAndReceivablesNet_019cb0c4-b426-76c8-97af-f82a6f6d8f66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermInvestmentsAndReceivablesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7ac4-9702-5d6203c5759c" xlink:to="loc_us-gaap_LongTermInvestmentsAndReceivablesNet_019cb0c4-b426-76c8-97af-f82a6f6d8f66" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofAmortizedCostBasisandFairValueofInvestmentsinDebtSecuritiesClassifiedasAvailableforSaleDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#DerivativeandFinancialInstrumentsScheduleofAmortizedCostBasisandFairValueofInvestmentsinDebtSecuritiesClassifiedasAvailableforSaleDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/DerivativeandFinancialInstrumentsScheduleofAmortizedCostBasisandFairValueofInvestmentsinDebtSecuritiesClassifiedasAvailableforSaleDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7f39-90e2-d557bf8e880c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7cca-b126-0306b07d039d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7f39-90e2-d557bf8e880c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7cca-b126-0306b07d039d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019cb0c4-b426-7cca-b126-0306b07d039d" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cb0c4-b426-7d5f-90b5-2f3ca2ca24e2" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_019cb0c4-b426-7520-a014-b0b63accad57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_019cb0c4-b426-7520-a014-b0b63accad57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_019cb0c4-b426-7205-a65e-eddd2de0f29d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommercialPaperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_CommercialPaperMember_019cb0c4-b426-7205-a65e-eddd2de0f29d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-77aa-aeab-a810b3ac05a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_019cb0c4-b426-77aa-aeab-a810b3ac05a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_019cb0c4-b426-7e4b-b84e-506e7b2ea97c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember_019cb0c4-b426-7e4b-b84e-506e7b2ea97c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtMember_019cb0c4-b426-7d1f-b037-9476b973f82c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignGovernmentDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_ForeignGovernmentDebtMember_019cb0c4-b426-7d1f-b037-9476b973f82c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_019cb0c4-b426-7d2a-acb5-0720c6f43ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cb0c4-b426-7b0a-a640-147eab72e52d" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_019cb0c4-b426-7d2a-acb5-0720c6f43ed5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019cb0c4-b426-7b48-9686-fa02fa23a572" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7f39-90e2-d557bf8e880c" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_019cb0c4-b426-7b48-9686-fa02fa23a572" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019cb0c4-b426-7fda-a1b6-82a64522f09c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019cb0c4-b426-7f39-90e2-d557bf8e880c" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019cb0c4-b426-7fda-a1b6-82a64522f09c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/ChangesinEquityDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#ChangesinEquityDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/ChangesinEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cb0c4-b426-7ce9-9ee4-3cd152434b94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestTable_019cb0c4-b426-78ba-9ede-ef717b3e519d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b426-7ce9-9ee4-3cd152434b94" xlink:to="loc_us-gaap_MinorityInterestTable_019cb0c4-b426-78ba-9ede-ef717b3e519d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b426-721a-85b7-674209dbd953" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MinorityInterestTable_019cb0c4-b426-78ba-9ede-ef717b3e519d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b426-721a-85b7-674209dbd953" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-721a-85b7-674209dbd953_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b426-721a-85b7-674209dbd953" xlink:to="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-721a-85b7-674209dbd953_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b426-721a-85b7-674209dbd953" xlink:to="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cb0c4-b426-7f5a-bf7a-a335846e110f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:to="loc_us-gaap_CommonStockMember_019cb0c4-b426-7f5a-bf7a-a335846e110f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019cb0c4-b426-725c-9b4c-dae7350b1fac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019cb0c4-b426-725c-9b4c-dae7350b1fac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019cb0c4-b426-72c2-9cc1-aa4c112d3c43" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019cb0c4-b426-72c2-9cc1-aa4c112d3c43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb0c4-b426-78f7-b65a-a5c3c3c57b6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb0c4-b426-78f7-b65a-a5c3c3c57b6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019cb0c4-b426-72b5-a41e-8e3ce49bf284" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b426-7204-8c86-051a9a074510" xlink:to="loc_us-gaap_RetainedEarningsMember_019cb0c4-b426-72b5-a41e-8e3ce49bf284" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b426-7ce9-9ee4-3cd152434b94" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb0c4-b426-7713-9eb3-a300d83089bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_StockholdersEquity_019cb0c4-b426-7713-9eb3-a300d83089bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb0c4-b426-72d3-8fd2-4646219b56f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_NetIncomeLoss_019cb0c4-b426-72d3-8fd2-4646219b56f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb0c4-b426-701d-9a5e-8d0997cd939c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb0c4-b426-701d-9a5e-8d0997cd939c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_019cb0c4-b426-73e2-a65c-08a78e63b4f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_DividendsCommonStock_019cb0c4-b426-73e2-a65c-08a78e63b4f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019cb0c4-b426-7212-ac17-f5c861560d22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019cb0c4-b426-7212-ac17-f5c861560d22" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramExciseTax_019cb0c4-b426-7235-82a4-b9e37e242563" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareRepurchaseProgramExciseTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_ShareRepurchaseProgramExciseTax_019cb0c4-b426-7235-82a4-b9e37e242563" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cb0c4-b426-71d1-b46a-525fbbd16686" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019cb0c4-b426-71d1-b46a-525fbbd16686" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_019cb0c4-b426-73b2-812c-507de54ad4ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019cb0c4-b426-7159-8f4f-6e421925a806" xlink:to="loc_us-gaap_StockholdersEquityOther_019cb0c4-b426-73b2-812c-507de54ad4ce" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb0c4-b426-7156-a5c5-ba329a8036cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cb0c4-b426-7c85-a69a-5bbd351d9582" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b426-7ce9-9ee4-3cd152434b94" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_019cb0c4-b426-7c85-a69a-5bbd351d9582" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/FairValueMeasurementNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#FairValueMeasurementNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/FairValueMeasurementNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7758-87cf-047dd0c988f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7758-87cf-047dd0c988f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_019cb0c4-b426-78b4-b176-c1ba17555d47" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7758-87cf-047dd0c988f3" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_019cb0c4-b426-78b4-b176-c1ba17555d47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb0c4-b426-78b4-b176-c1ba17555d47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb0c4-b426-78b4-b176-c1ba17555d47" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb0c4-b426-78b4-b176-c1ba17555d47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb0c4-b426-72ca-b2c8-bdcec9f8e608" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_019cb0c4-b426-78b4-b176-c1ba17555d47" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb0c4-b426-72ca-b2c8-bdcec9f8e608" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_SurmontMember_019cb0c4-b426-7f07-b0f3-7d1825a051a6" xlink:href="cop-20260331.xsd#cop_SurmontMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_019cb0c4-b426-72ca-b2c8-bdcec9f8e608" xlink:to="loc_cop_SurmontMember_019cb0c4-b426-7f07-b0f3-7d1825a051a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019cb0c4-b426-7731-8237-abbd206df80c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_019cb0c4-b426-7731-8237-abbd206df80c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019cb0c4-b426-7dc7-ba8a-71db72252212" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh_019cb0c4-b426-7dc7-ba8a-71db72252212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_BusinessCombinationContingentConsiderationArrangementsTerm_019cb0c4-b426-7915-8f18-cf537921149c" xlink:href="cop-20260331.xsd#cop_BusinessCombinationContingentConsiderationArrangementsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_cop_BusinessCombinationContingentConsiderationArrangementsTerm_019cb0c4-b426-7915-8f18-cf537921149c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_BusinessAcquisitionContingentConsiderationCostPerEveryDollarExceedingThreshold_019cb0c4-b426-77ad-b75c-5c0a3d7604a9" xlink:href="cop-20260331.xsd#cop_BusinessAcquisitionContingentConsiderationCostPerEveryDollarExceedingThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_cop_BusinessAcquisitionContingentConsiderationCostPerEveryDollarExceedingThreshold_019cb0c4-b426-77ad-b75c-5c0a3d7604a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_BusinessAcquisitionContingentConsiderationThresholdAverage_019cb0c4-b426-71fa-a076-4f18d838ebbe" xlink:href="cop-20260331.xsd#cop_BusinessAcquisitionContingentConsiderationThresholdAverage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_cop_BusinessAcquisitionContingentConsiderationThresholdAverage_019cb0c4-b426-71fa-a076-4f18d838ebbe" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueUndiscountedAmountHigh_019cb0c4-b426-7d8f-bfe7-2508d6c64938" xlink:href="cop-20260331.xsd#cop_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueUndiscountedAmountHigh"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_cop_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueUndiscountedAmountHigh_019cb0c4-b426-7d8f-bfe7-2508d6c64938" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019cb0c4-b426-7148-a7e8-139d784e4ba2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7c1d-a06a-f10b1aeeacfc" xlink:to="loc_us-gaap_PaymentForContingentConsiderationLiabilityFinancingActivities_019cb0c4-b426-7148-a7e8-139d784e4ba2" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/FairValueMeasurementScheduleofFairValueHierarchyforGrossFinancialAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#FairValueMeasurementScheduleofFairValueHierarchyforGrossFinancialAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/FairValueMeasurementScheduleofFairValueHierarchyforGrossFinancialAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb0c4-b426-7301-893b-15e5086d304c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb0c4-b426-7301-893b-15e5086d304c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-74c0-889b-f4a19b871b25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cb0c4-b426-7301-893b-15e5086d304c" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-74c0-889b-f4a19b871b25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-74c0-889b-f4a19b871b25_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-74c0-889b-f4a19b871b25" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-74c0-889b-f4a19b871b25_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7493-9c1b-7045001d1d75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-74c0-889b-f4a19b871b25" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7493-9c1b-7045001d1d75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cb0c4-b426-7e49-b863-603d68d0ca40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7493-9c1b-7045001d1d75" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cb0c4-b426-7e49-b863-603d68d0ca40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cb0c4-b426-72da-8b5a-3cb2eaa549d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7493-9c1b-7045001d1d75" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cb0c4-b426-72da-8b5a-3cb2eaa549d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cb0c4-b426-72b5-8e9c-882d939f7ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7493-9c1b-7045001d1d75" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cb0c4-b426-72b5-8e9c-882d939f7ee6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019cb0c4-b426-75af-bed3-104bcd907506" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019cb0c4-b426-75af-bed3-104bcd907506" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_019cb0c4-b426-76ae-855c-ec4e057c0819" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_019cb0c4-b426-76ae-855c-ec4e057c0819" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cb0c4-b426-7317-b25e-ade978cd65b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019cb0c4-b426-7317-b25e-ade978cd65b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_019cb0c4-b426-7b8d-8117-0ec1df3ee381" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue_019cb0c4-b426-7b8d-8117-0ec1df3ee381" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019cb0c4-b426-70ab-a5c1-39a4b98f8dcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019cb0c4-b426-70ab-a5c1-39a4b98f8dcb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019cb0c4-b426-7045-b763-46e8a5b28196" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cb0c4-b426-7783-90b8-0a686689df7c" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019cb0c4-b426-7045-b763-46e8a5b28196" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/FairValueMeasurementScheduleofFairValueMeasurementInputsandValuationTechniquesDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#FairValueMeasurementScheduleofFairValueMeasurementInputsandValuationTechniquesDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/FairValueMeasurementScheduleofFairValueMeasurementInputsandValuationTechniquesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7e6b-bd29-3c334cef9f1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7e6b-bd29-3c334cef9f1e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-7b78-b456-377813e49171" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-7b78-b456-377813e49171" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7b78-b456-377813e49171_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-7b78-b456-377813e49171" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-7b78-b456-377813e49171_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-71b6-98be-991edc0a1eca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cb0c4-b426-7b78-b456-377813e49171" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-71b6-98be-991edc0a1eca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cb0c4-b426-71ee-b497-2b017da2c71e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cb0c4-b426-71b6-98be-991edc0a1eca" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cb0c4-b426-71ee-b497-2b017da2c71e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cb0c4-b426-7dc9-b34d-38b6d641c3be" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:to="loc_srt_RangeAxis_019cb0c4-b426-7dc9-b34d-38b6d641c3be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb0c4-b426-7dc9-b34d-38b6d641c3be_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cb0c4-b426-7dc9-b34d-38b6d641c3be" xlink:to="loc_srt_RangeMember_019cb0c4-b426-7dc9-b34d-38b6d641c3be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cb0c4-b426-7f99-ac62-71ce5d7a5f6f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cb0c4-b426-7dc9-b34d-38b6d641c3be" xlink:to="loc_srt_RangeMember_019cb0c4-b426-7f99-ac62-71ce5d7a5f6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cb0c4-b426-723a-8761-8e7f4ce5516a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb0c4-b426-7f99-ac62-71ce5d7a5f6f" xlink:to="loc_srt_MinimumMember_019cb0c4-b426-723a-8761-8e7f4ce5516a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cb0c4-b426-7256-a090-f34189bc029b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb0c4-b426-7f99-ac62-71ce5d7a5f6f" xlink:to="loc_srt_MaximumMember_019cb0c4-b426-7256-a090-f34189bc029b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ArithmeticAverageMember_019cb0c4-b426-7b20-8a1a-37127e6cba50" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ArithmeticAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cb0c4-b426-7f99-ac62-71ce5d7a5f6f" xlink:to="loc_srt_ArithmeticAverageMember_019cb0c4-b426-7b20-8a1a-37127e6cba50" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019cb0c4-b426-7a5a-aac6-9c20abf68e78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019cb0c4-b426-7a5a-aac6-9c20abf68e78" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cb0c4-b426-7a5a-aac6-9c20abf68e78_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019cb0c4-b426-7a5a-aac6-9c20abf68e78" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cb0c4-b426-7a5a-aac6-9c20abf68e78_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019cb0c4-b426-7db6-8746-973def328ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019cb0c4-b426-7a5a-aac6-9c20abf68e78" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019cb0c4-b426-7db6-8746-973def328ee5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_MeasurementInputCommodityPriceOutlookMember_019cb0c4-b426-7ae5-8055-0edc95fba7ff" xlink:href="cop-20260331.xsd#cop_MeasurementInputCommodityPriceOutlookMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019cb0c4-b426-7db6-8746-973def328ee5" xlink:to="loc_cop_MeasurementInputCommodityPriceOutlookMember_019cb0c4-b426-7ae5-8055-0edc95fba7ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019cb0c4-b426-7011-888a-3ee29c625154" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019cb0c4-b426-7c0a-91cc-181e0dab31d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019cb0c4-b426-70fd-9f63-65e5bc6c4a8b" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019cb0c4-b426-7c0a-91cc-181e0dab31d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cb0c4-b426-746c-a919-142a8e7699dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019cb0c4-b426-7c0a-91cc-181e0dab31d7" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019cb0c4-b426-746c-a919-142a8e7699dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019cb0c4-b426-745a-afac-7d7c8e08707a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7e6b-bd29-3c334cef9f1e" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_019cb0c4-b426-745a-afac-7d7c8e08707a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019cb0c4-b426-7d52-831a-74e3cf429771" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019cb0c4-b426-7e6b-bd29-3c334cef9f1e" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiabilityMeasurementInput_019cb0c4-b426-7d52-831a-74e3cf429771" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/FairValueMeasurementScheduleofNetFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#FairValueMeasurementScheduleofNetFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/FairValueMeasurementScheduleofNetFairValueofFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cb0c4-b426-7e59-8a66-9621d4b4f378" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-7c7d-9cd4-ecf14ec760a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cb0c4-b426-7e59-8a66-9621d4b4f378" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-7c7d-9cd4-ecf14ec760a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7375-8546-bf900f2ebebf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-7c7d-9cd4-ecf14ec760a4" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7375-8546-bf900f2ebebf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7375-8546-bf900f2ebebf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7375-8546-bf900f2ebebf" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-7375-8546-bf900f2ebebf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-7943-86d5-75d7312b33d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019cb0c4-b426-7375-8546-bf900f2ebebf" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-7943-86d5-75d7312b33d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-783b-a72f-fbce890f0bb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019cb0c4-b426-7943-86d5-75d7312b33d2" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-783b-a72f-fbce890f0bb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb0c4-b426-7a79-9095-fd3fac61cccd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-783b-a72f-fbce890f0bb1" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019cb0c4-b426-7a79-9095-fd3fac61cccd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cb0c4-b426-7cbf-9b60-4c8de3a51b86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019cb0c4-b426-783b-a72f-fbce890f0bb1" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019cb0c4-b426-7cbf-9b60-4c8de3a51b86" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7a60-8d33-f2495b04e168" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cb0c4-b426-7c7d-9cd4-ecf14ec760a4" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7a60-8d33-f2495b04e168" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7a60-8d33-f2495b04e168_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7a60-8d33-f2495b04e168" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-7a60-8d33-f2495b04e168_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-74f9-aa6b-9b5ca5b78e82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cb0c4-b426-7a60-8d33-f2495b04e168" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-74f9-aa6b-9b5ca5b78e82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cb0c4-b426-7b38-a8b9-07a1a5772f26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cb0c4-b426-74f9-aa6b-9b5ca5b78e82" xlink:to="loc_us-gaap_CommodityContractMember_019cb0c4-b426-7b38-a8b9-07a1a5772f26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cb0c4-b426-72f5-b40d-e917dee1b772" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cb0c4-b426-7e59-8a66-9621d4b4f378" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cb0c4-b426-72f5-b40d-e917dee1b772" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019cb0c4-b426-7164-bcda-b5d7a8ba0fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cb0c4-b426-72f5-b40d-e917dee1b772" xlink:to="loc_us-gaap_DerivativeAssets_019cb0c4-b426-7164-bcda-b5d7a8ba0fc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019cb0c4-b426-7914-9527-f0e05fcd5855" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_019cb0c4-b426-72f5-b40d-e917dee1b772" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019cb0c4-b426-7914-9527-f0e05fcd5855" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cb0c4-b426-7526-a4c8-1c730c23c686" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019cb0c4-b426-7e59-8a66-9621d4b4f378" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cb0c4-b426-7526-a4c8-1c730c23c686" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019cb0c4-b426-7601-903d-12178731a1a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cb0c4-b426-7526-a4c8-1c730c23c686" xlink:to="loc_us-gaap_LongTermDebt_019cb0c4-b426-7601-903d-12178731a1a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019cb0c4-b426-782b-9ee9-fe9e50867703" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract_019cb0c4-b426-7526-a4c8-1c730c23c686" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral_019cb0c4-b426-782b-9ee9-fe9e50867703" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleofComponentsofAccumulatedOtherComprehensiveLossintheEquitySectionoftheBalanceSheetDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#AccumulatedOtherComprehensiveIncomeLossScheduleofComponentsofAccumulatedOtherComprehensiveLossintheEquitySectionoftheBalanceSheetDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/AccumulatedOtherComprehensiveIncomeLossScheduleofComponentsofAccumulatedOtherComprehensiveLossintheEquitySectionoftheBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019cb0c4-b4e9-7928-8145-7d2ec20635ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019cb0c4-b4e9-73a0-85ed-6891d703e9bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019cb0c4-b4e9-7928-8145-7d2ec20635ff" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019cb0c4-b4e9-73a0-85ed-6891d703e9bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019cb0c4-b4e9-73a0-85ed-6891d703e9bc" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d" xlink:to="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cb0c4-b4e9-74c1-a3de-7e02a7b4446d" xlink:to="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019cb0c4-b4e9-7c28-9445-b09aadee195e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019cb0c4-b4e9-7c28-9445-b09aadee195e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019cb0c4-b4e9-74d5-b67a-426e1f529ede" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_019cb0c4-b4e9-74d5-b67a-426e1f529ede" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019cb0c4-b4e9-7771-a10a-a63e67c96bfd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019cb0c4-b4e9-7771-a10a-a63e67c96bfd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019cb0c4-b4e9-72ca-8aa7-678b24590b61" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019cb0c4-b4e9-72ca-8aa7-678b24590b61" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb0c4-b4e9-77ca-9bee-a8eae60972ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cb0c4-b4e9-740e-a422-c74134bcc7f7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cb0c4-b4e9-77ca-9bee-a8eae60972ab" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cb0c4-b4e9-7e4e-8d8b-2935f9ae347d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019cb0c4-b4e9-7928-8145-7d2ec20635ff" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cb0c4-b4e9-7e4e-8d8b-2935f9ae347d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb0c4-b4e9-7ad8-a4c7-21b079196cef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cb0c4-b4e9-7e4e-8d8b-2935f9ae347d" xlink:to="loc_us-gaap_StockholdersEquity_019cb0c4-b4e9-7ad8-a4c7-21b079196cef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb0c4-b4e9-730b-b356-0ae54994f025" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_019cb0c4-b4e9-7e4e-8d8b-2935f9ae347d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019cb0c4-b4e9-730b-b356-0ae54994f025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019cb0c4-b4e9-70ea-aa14-55909afa2d4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/RelatedPartyTransactionsScheduleofSignificantTransactionswithRelatedPartiesDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#RelatedPartyTransactionsScheduleofSignificantTransactionswithRelatedPartiesDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/RelatedPartyTransactionsScheduleofSignificantTransactionswithRelatedPartiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019cb0c4-b4e9-720b-854d-9a2ff2391382" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb0c4-b4e9-7131-b566-43745b67b0d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb0c4-b4e9-720b-854d-9a2ff2391382" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb0c4-b4e9-7131-b566-43745b67b0d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cb0c4-b4e9-7131-b566-43745b67b0d2" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8" xlink:to="loc_us-gaap_RelatedPartyDomain_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cb0c4-b4e9-78c1-8b37-c25858fb1a09" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cb0c4-b4e9-7fed-b9f3-b9b7185440a8" xlink:to="loc_us-gaap_RelatedPartyDomain_019cb0c4-b4e9-78c1-8b37-c25858fb1a09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyMember_019cb0c4-b4e9-7697-b569-d5c0ce5c4684" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cb0c4-b4e9-78c1-8b37-c25858fb1a09" xlink:to="loc_us-gaap_RelatedPartyMember_019cb0c4-b4e9-7697-b569-d5c0ce5c4684" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_BalanceSheetRelatedPartyAbstract_019cb0c4-b4e9-79ca-afc6-6527054c05b8" xlink:href="cop-20260331.xsd#cop_BalanceSheetRelatedPartyAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb0c4-b4e9-720b-854d-9a2ff2391382" xlink:to="loc_cop_BalanceSheetRelatedPartyAbstract_019cb0c4-b4e9-79ca-afc6-6527054c05b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_019cb0c4-b4e9-7d7a-b545-77b49c9596b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_BalanceSheetRelatedPartyAbstract_019cb0c4-b4e9-79ca-afc6-6527054c05b8" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_019cb0c4-b4e9-7d7a-b545-77b49c9596b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019cb0c4-b4e9-7bd4-a567-2d6daa8f35a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_BalanceSheetRelatedPartyAbstract_019cb0c4-b4e9-79ca-afc6-6527054c05b8" xlink:to="loc_us-gaap_AccountsPayableCurrent_019cb0c4-b4e9-7bd4-a567-2d6daa8f35a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RelatedPartyTransactionAbstract_019cb0c4-b4e9-75a3-b9ea-50c668e29712" xlink:href="cop-20260331.xsd#cop_RelatedPartyTransactionAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cb0c4-b4e9-720b-854d-9a2ff2391382" xlink:to="loc_cop_RelatedPartyTransactionAbstract_019cb0c4-b4e9-75a3-b9ea-50c668e29712" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_RevenuesAndOtherIncome_019cb0c4-b4e9-7a3e-8ffb-d565a1d8ebcb" xlink:href="cop-20260331.xsd#cop_RevenuesAndOtherIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_RelatedPartyTransactionAbstract_019cb0c4-b4e9-75a3-b9ea-50c668e29712" xlink:to="loc_cop_RevenuesAndOtherIncome_019cb0c4-b4e9-7a3e-8ffb-d565a1d8ebcb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019cb0c4-b4e9-7b82-af66-7400bc3aba39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_RelatedPartyTransactionAbstract_019cb0c4-b4e9-75a3-b9ea-50c668e29712" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019cb0c4-b4e9-7b82-af66-7400bc3aba39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019cb0c4-b4e9-7cd6-a402-4e448ac11c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_RelatedPartyTransactionAbstract_019cb0c4-b4e9-75a3-b9ea-50c668e29712" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019cb0c4-b4e9-7cd6-a402-4e448ac11c9f" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/EmployeeBenefitPlansScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#EmployeeBenefitPlansScheduleofComponentsofNetPeriodicBenefitCostDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/EmployeeBenefitPlansScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019cb0c4-b4e9-7e0e-afb0-4a85ad8e30d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019cb0c4-b4e9-7dd1-bef5-299c8f9d6213" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019cb0c4-b4e9-7e0e-afb0-4a85ad8e30d0" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019cb0c4-b4e9-7dd1-bef5-299c8f9d6213" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019cb0c4-b4e9-7dd1-bef5-299c8f9d6213" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-7a19-9770-e271071b74e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019cb0c4-b4e9-76ff-97cd-d6bdfd811ee1" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-7a19-9770-e271071b74e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticPlanMember_019cb0c4-b4e9-7519-9d58-02d02a371548" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-7a19-9770-e271071b74e2" xlink:to="loc_us-gaap_DomesticPlanMember_019cb0c4-b4e9-7519-9d58-02d02a371548" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019cb0c4-b4e9-78ea-b7cc-8346f2b2c2a4" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DomesticPlanMember_019cb0c4-b4e9-7519-9d58-02d02a371548" xlink:to="loc_country_US_019cb0c4-b4e9-78ea-b7cc-8346f2b2c2a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_019cb0c4-b4e9-7425-a244-9913d1a11ba7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_019cb0c4-b4e9-7a19-9770-e271071b74e2" xlink:to="loc_us-gaap_ForeignPlanMember_019cb0c4-b4e9-7425-a244-9913d1a11ba7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019cb0c4-b4e9-7dd1-bef5-299c8f9d6213" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7bd2-a4dc-3e48d285b276" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019cb0c4-b4e9-7ca7-ac61-0a2c136e6611" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7bd2-a4dc-3e48d285b276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019cb0c4-b4e9-7a2e-adb2-c2beb34e1b67" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7bd2-a4dc-3e48d285b276" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019cb0c4-b4e9-7a2e-adb2-c2beb34e1b67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019cb0c4-b4e9-7cc1-8650-e6fb758a7dff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019cb0c4-b4e9-7bd2-a4dc-3e48d285b276" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019cb0c4-b4e9-7cc1-8650-e6fb758a7dff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019cb0c4-b4e9-7e0e-afb0-4a85ad8e30d0" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019cb0c4-b4e9-7a7a-9d1d-d2b86d483e9b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019cb0c4-b4e9-7a7a-9d1d-d2b86d483e9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019cb0c4-b4e9-74b9-88e7-082bf04ea3b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019cb0c4-b4e9-74b9-88e7-082bf04ea3b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019cb0c4-b4e9-7f36-b341-89d5b1f4ee22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019cb0c4-b4e9-7f36-b341-89d5b1f4ee22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019cb0c4-b4e9-78a8-a634-bb1be22acef8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019cb0c4-b4e9-78a8-a634-bb1be22acef8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019cb0c4-b4e9-780b-9144-f5ecd5856370" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019cb0c4-b4e9-780b-9144-f5ecd5856370" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019cb0c4-b4e9-704b-b269-0fc3082cb964" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019cb0c4-b4e9-704b-b269-0fc3082cb964" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019cb0c4-b4e9-7692-807c-f11d56027643" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_019cb0c4-b4e9-75f5-b145-b9a5346d4886" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019cb0c4-b4e9-7692-807c-f11d56027643" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#EmployeeBenefitPlansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019db139-7c4b-7560-b3fe-515e60e61ec8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019db139-7c4b-7d72-a555-858b0a0963cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019db139-7c4b-7560-b3fe-515e60e61ec8" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019db139-7c4b-7d72-a555-858b0a0963cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_019db139-7c4b-7ba5-84e1-4671145c0b13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019db139-7c4b-7d72-a555-858b0a0963cb" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_019db139-7c4b-7ba5-84e1-4671145c0b13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019db139-7c4b-7ba5-84e1-4671145c0b13_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019db139-7c4b-7ba5-84e1-4671145c0b13" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019db139-7c4b-7ba5-84e1-4671145c0b13_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019db139-7c4b-7283-905a-d343eca1ec56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019db139-7c4b-7ba5-84e1-4671145c0b13" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019db139-7c4b-7283-905a-d343eca1ec56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticPlanMember_019dbbee-41b0-7abd-9348-327c35502631" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_019db139-7c4b-7283-905a-d343eca1ec56" xlink:to="loc_us-gaap_DomesticPlanMember_019dbbee-41b0-7abd-9348-327c35502631" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019db139-7c4b-72b2-83fd-eb05b59adef8" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DomesticPlanMember_019dbbee-41b0-7abd-9348-327c35502631" xlink:to="loc_country_US_019db139-7c4b-72b2-83fd-eb05b59adef8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019db139-7c4b-7e91-95b7-89550e5cba1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019db139-7c4b-7d72-a555-858b0a0963cb" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019db139-7c4b-7e91-95b7-89550e5cba1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019db139-7c4b-7e91-95b7-89550e5cba1e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019db139-7c4b-7e91-95b7-89550e5cba1e" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019db139-7c4b-7e91-95b7-89550e5cba1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019db139-7c4b-7325-b4cb-c6b98032f4af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019db139-7c4b-7e91-95b7-89550e5cba1e" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019db139-7c4b-7325-b4cb-c6b98032f4af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019db139-7c4b-7f9d-95fc-ccb0e6404b40" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019db139-7c4b-7325-b4cb-c6b98032f4af" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019db139-7c4b-7f9d-95fc-ccb0e6404b40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019db139-7c4b-7aa5-81aa-18aadc157f16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019db139-7c4b-7560-b3fe-515e60e61ec8" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019db139-7c4b-7aa5-81aa-18aadc157f16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_019dc033-dde6-7ce7-9264-4b610d93e19c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPensionPlanObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019db139-7c4b-7560-b3fe-515e60e61ec8" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_019dc033-dde6-7ce7-9264-4b610d93e19c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/SalesandOtherOperatingRevenuesRevenueDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#SalesandOtherOperatingRevenuesRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/SalesandOtherOperatingRevenuesRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cb0c4-b4e9-7ad1-a945-40a91dceab1e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019cb0c4-b4e9-7af1-bd14-29f2b41edbcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b4e9-7ad1-a945-40a91dceab1e" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019cb0c4-b4e9-7af1-bd14-29f2b41edbcf" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cb0c4-b4e9-7ce5-a3b2-23f394276d88" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cb0c4-b4e9-7af1-bd14-29f2b41edbcf" xlink:to="loc_srt_ProductOrServiceAxis_019cb0c4-b4e9-7ce5-a3b2-23f394276d88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7ce5-a3b2-23f394276d88_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cb0c4-b4e9-7ce5-a3b2-23f394276d88" xlink:to="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7ce5-a3b2-23f394276d88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7286-82ce-6f5cc5c3b3e5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cb0c4-b4e9-7ce5-a3b2-23f394276d88" xlink:to="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7286-82ce-6f5cc5c3b3e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_PhysicalGasContractsMember_019cb0c4-b4e9-7c14-bf43-06a6cabb6b80" xlink:href="cop-20260331.xsd#cop_PhysicalGasContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7286-82ce-6f5cc5c3b3e5" xlink:to="loc_cop_PhysicalGasContractsMember_019cb0c4-b4e9-7c14-bf43-06a6cabb6b80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_FinancialDerivativeContractsMember_019cb0c4-b4e9-772c-a556-cc728627ba6a" xlink:href="cop-20260331.xsd#cop_FinancialDerivativeContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cb0c4-b4e9-7286-82ce-6f5cc5c3b3e5" xlink:to="loc_cop_FinancialDerivativeContractsMember_019cb0c4-b4e9-772c-a556-cc728627ba6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb0c4-b4e9-7d30-a055-18ff3c333c59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b4e9-7ad1-a945-40a91dceab1e" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cb0c4-b4e9-7d30-a055-18ff3c333c59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_019cb0c4-b4e9-778f-8b30-129759010184" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b4e9-7ad1-a945-40a91dceab1e" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_019cb0c4-b4e9-778f-8b30-129759010184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019cb0c4-b4e9-7b50-b9b2-da16f73c3e68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cb0c4-b4e9-7ad1-a945-40a91dceab1e" xlink:to="loc_us-gaap_Revenues_019cb0c4-b4e9-7b50-b9b2-da16f73c3e68" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationSummaryofSegmentLevelNetIncomeLossDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#SegmentDisclosuresandRelatedInformationSummaryofSegmentLevelNetIncomeLossDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationSummaryofSegmentLevelNetIncomeLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7642-9f8a-33102d15dede" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7642-9f8a-33102d15dede" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7654-afe0-2893a442b78d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7642-9f8a-33102d15dede" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7654-afe0-2893a442b78d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7654-afe0-2893a442b78d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7654-afe0-2893a442b78d" xlink:to="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7654-afe0-2893a442b78d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7d65-a508-443a1b481b12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7654-afe0-2893a442b78d" xlink:to="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7d65-a508-443a1b481b12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:href="cop-20260331.xsd#cop_TotalSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7d65-a508-443a1b481b12" xlink:to="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AlaskaSegmentMember_019cb0c4-b4e9-7069-98e4-fd1d5cde2b1c" xlink:href="cop-20260331.xsd#cop_AlaskaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:to="loc_cop_AlaskaSegmentMember_019cb0c4-b4e9-7069-98e4-fd1d5cde2b1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_LowerFortyEightMember_019cb0c4-b4e9-7a12-ae7e-449c123b27ac" xlink:href="cop-20260331.xsd#cop_LowerFortyEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:to="loc_cop_LowerFortyEightMember_019cb0c4-b4e9-7a12-ae7e-449c123b27ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CanadaOperatingSegmentMember_019cb0c4-b4e9-7373-8c00-36586a6fc6a3" xlink:href="cop-20260331.xsd#cop_CanadaOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:to="loc_cop_CanadaOperatingSegmentMember_019cb0c4-b4e9-7373-8c00-36586a6fc6a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_EuropeMiddleEastAndNorthAfricaSegmentMember_019cb0c4-b4e9-7e22-87a0-5abf32083c25" xlink:href="cop-20260331.xsd#cop_EuropeMiddleEastAndNorthAfricaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:to="loc_cop_EuropeMiddleEastAndNorthAfricaSegmentMember_019cb0c4-b4e9-7e22-87a0-5abf32083c25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AsiaPacificOperatingSegmentMember_019cb0c4-b4e9-7baa-89ec-4d2c2d95a213" xlink:href="cop-20260331.xsd#cop_AsiaPacificOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-7245-ab66-b28930c5f298" xlink:to="loc_cop_AsiaPacificOperatingSegmentMember_019cb0c4-b4e9-7baa-89ec-4d2c2d95a213" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CorporateSegmentMember_019cb0c4-b4e9-7a87-8334-70e571f491b6" xlink:href="cop-20260331.xsd#cop_CorporateSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7d65-a508-443a1b481b12" xlink:to="loc_cop_CorporateSegmentMember_019cb0c4-b4e9-7a87-8334-70e571f491b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-72fd-b47c-e4d4193efc37" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7642-9f8a-33102d15dede" xlink:to="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-72fd-b47c-e4d4193efc37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-72fd-b47c-e4d4193efc37_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-72fd-b47c-e4d4193efc37" xlink:to="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-72fd-b47c-e4d4193efc37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-72fd-b47c-e4d4193efc37" xlink:to="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cb0c4-b4e9-76d7-8e1b-ff22d1d77f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cb0c4-b4e9-76d7-8e1b-ff22d1d77f8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019cb0c4-b4e9-749e-b4c2-877765a741da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019cb0c4-b4e9-749e-b4c2-877765a741da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OperatingSegmentsAndCorporateNonSegmentMember_019cb0c4-b4e9-75cb-b349-263502f85e43" xlink:href="cop-20260331.xsd#cop_OperatingSegmentsAndCorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:to="loc_cop_OperatingSegmentsAndCorporateNonSegmentMember_019cb0c4-b4e9-75cb-b349-263502f85e43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cb0c4-b4e9-75a0-8b8b-3f9fc976a241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-756c-8583-ee30162990e2" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cb0c4-b4e9-75a0-8b8b-3f9fc976a241" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019db0c2-0be8-75d5-87f5-4c74225d92d6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7642-9f8a-33102d15dede" xlink:to="loc_srt_ProductOrServiceAxis_019db0c2-0be8-75d5-87f5-4c74225d92d6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019db0c2-0be8-75d5-87f5-4c74225d92d6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019db0c2-0be8-75d5-87f5-4c74225d92d6" xlink:to="loc_srt_ProductsAndServicesDomain_019db0c2-0be8-75d5-87f5-4c74225d92d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019db0c2-0be8-7082-939c-c6b4aebd6f7b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019db0c2-0be8-75d5-87f5-4c74225d92d6" xlink:to="loc_srt_ProductsAndServicesDomain_019db0c2-0be8-7082-939c-c6b4aebd6f7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_PhysicalGasContractsMember_019db0c2-0be8-7d08-9506-39b8b622a746" xlink:href="cop-20260331.xsd#cop_PhysicalGasContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019db0c2-0be8-7082-939c-c6b4aebd6f7b" xlink:to="loc_cop_PhysicalGasContractsMember_019db0c2-0be8-7d08-9506-39b8b622a746" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019cb0c4-b4e9-707e-886c-1cb0910ee0d4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_Revenues_019cb0c4-b4e9-707e-886c-1cb0910ee0d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingCostsAndExpenses_019cb0c4-b4e9-78c1-a551-443b29e4ac98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_OperatingCostsAndExpenses_019cb0c4-b4e9-78c1-a551-443b29e4ac98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019cb0c4-b4e9-71b4-86fc-85a18d0bf21d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019cb0c4-b4e9-71b4-86fc-85a18d0bf21d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cb0c4-b4e9-7042-9333-71ab2cf1ebf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cb0c4-b4e9-7042-9333-71ab2cf1ebf8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_SignificantSegmentExpenses_019cb0c4-b4e9-724c-bf11-9b94a025afc3" xlink:href="cop-20260331.xsd#cop_SignificantSegmentExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_cop_SignificantSegmentExpenses_019cb0c4-b4e9-724c-bf11-9b94a025afc3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb0c4-b4e9-7fe1-81a1-3faad3115165" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cb0c4-b4e9-7fe1-81a1-3faad3115165" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019cb0c4-b4e9-74ab-b580-f0b61ff906c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019cb0c4-b4e9-74ab-b580-f0b61ff906c7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestAndDebtExpense_019cb0c4-b4e9-7051-a702-07e2865a2a51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_InterestAndDebtExpense_019cb0c4-b4e9-7051-a702-07e2865a2a51" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OtherSegmentExpense_019cb0c4-b4e9-7ed0-a51e-60c7e8b00fa5" xlink:href="cop-20260331.xsd#cop_OtherSegmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_cop_OtherSegmentExpense_019cb0c4-b4e9-7ed0-a51e-60c7e8b00fa5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019cb0c4-b4e9-72f8-b1ce-d08dc450ac24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019cb0c4-b4e9-72f8-b1ce-d08dc450ac24" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cb0c4-b4e9-77e4-8940-fc48e7bda378" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_NetIncomeLoss_019cb0c4-b4e9-77e4-8940-fc48e7bda378" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_019db0c2-0be8-76b2-befe-61bf59cea370" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-7f56-b0c3-32755127d787" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_019db0c2-0be8-76b2-befe-61bf59cea370" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationOtherSegmentDisclosureDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#SegmentDisclosuresandRelatedInformationOtherSegmentDisclosureDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationOtherSegmentDisclosureDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-76ad-9caf-07ce1bca6f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7d83-9e16-6f6e10563ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-76ad-9caf-07ce1bca6f9e" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7d83-9e16-6f6e10563ce3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7337-b185-0e1176851959" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7d83-9e16-6f6e10563ce3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7337-b185-0e1176851959" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7337-b185-0e1176851959_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7337-b185-0e1176851959" xlink:to="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7337-b185-0e1176851959_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7889-a532-168140735451" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cb0c4-b4e9-7337-b185-0e1176851959" xlink:to="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7889-a532-168140735451" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:href="cop-20260331.xsd#cop_TotalSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cb0c4-b4e9-7889-a532-168140735451" xlink:to="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AlaskaSegmentMember_019cb0c4-b4e9-73fc-9d7a-14a6637070d4" xlink:href="cop-20260331.xsd#cop_AlaskaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:to="loc_cop_AlaskaSegmentMember_019cb0c4-b4e9-73fc-9d7a-14a6637070d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_LowerFortyEightMember_019cb0c4-b4e9-7460-84ae-048aa8def073" xlink:href="cop-20260331.xsd#cop_LowerFortyEightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:to="loc_cop_LowerFortyEightMember_019cb0c4-b4e9-7460-84ae-048aa8def073" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CanadaOperatingSegmentMember_019cb0c4-b4e9-76fb-861c-5fc93753c172" xlink:href="cop-20260331.xsd#cop_CanadaOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:to="loc_cop_CanadaOperatingSegmentMember_019cb0c4-b4e9-76fb-861c-5fc93753c172" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_EuropeMiddleEastAndNorthAfricaSegmentMember_019cb0c4-b4e9-7c14-832e-e6bf8a5a4957" xlink:href="cop-20260331.xsd#cop_EuropeMiddleEastAndNorthAfricaSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:to="loc_cop_EuropeMiddleEastAndNorthAfricaSegmentMember_019cb0c4-b4e9-7c14-832e-e6bf8a5a4957" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_AsiaPacificOperatingSegmentMember_019cb0c4-b4e9-7c4d-afcb-703b69ed2abe" xlink:href="cop-20260331.xsd#cop_AsiaPacificOperatingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cop_TotalSegmentsMember_019cb0c4-b4e9-75f2-996d-ed37b829d4fa" xlink:to="loc_cop_AsiaPacificOperatingSegmentMember_019cb0c4-b4e9-7c4d-afcb-703b69ed2abe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cb0c4-b4e9-7d83-9e16-6f6e10563ce3" xlink:to="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c" xlink:to="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-71c9-badb-9a7485015b54" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cb0c4-b4e9-7f7c-b8db-edfd9a23e35c" xlink:to="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-71c9-badb-9a7485015b54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cb0c4-b4e9-7a73-a326-c6102624419b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-71c9-badb-9a7485015b54" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cb0c4-b4e9-7a73-a326-c6102624419b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019cb0c4-b4e9-7e7f-bcf8-e200e35ac75a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cb0c4-b4e9-71c9-badb-9a7485015b54" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019cb0c4-b4e9-7e7f-bcf8-e200e35ac75a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_019cb0c4-b4e9-74a5-9145-b4ecb2097369" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-76ad-9caf-07ce1bca6f9e" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_019cb0c4-b4e9-74a5-9145-b4ecb2097369" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cb0c4-b4e9-7730-b954-a69ffe11974b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-76ad-9caf-07ce1bca6f9e" xlink:to="loc_us-gaap_Assets_019cb0c4-b4e9-7730-b954-a69ffe11974b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_SegmentReportingInformationCapitalExpendituresAndInvestments_019cb0c4-b4e9-76d4-b886-1ade6b600912" xlink:href="cop-20260331.xsd#cop_SegmentReportingInformationCapitalExpendituresAndInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cb0c4-b4e9-76ad-9caf-07ce1bca6f9e" xlink:to="loc_cop_SegmentReportingInformationCapitalExpendituresAndInvestments_019cb0c4-b4e9-76d4-b886-1ade6b600912" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationSalesandOtherOperatingRevenuesbyProductDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#SegmentDisclosuresandRelatedInformationSalesandOtherOperatingRevenuesbyProductDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationSalesandOtherOperatingRevenuesbyProductDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019db123-b015-7b7f-a3b9-e48d2b4fca48" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019db123-b015-746c-830b-d6acae4b02e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019db123-b015-7b7f-a3b9-e48d2b4fca48" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019db123-b015-746c-830b-d6acae4b02e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_019db123-b015-7212-a715-e550d984688e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019db123-b015-746c-830b-d6acae4b02e3" xlink:to="loc_srt_EnergyAxis_019db123-b015-7212-a715-e550d984688e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_019db123-b015-7212-a715-e550d984688e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_019db123-b015-7212-a715-e550d984688e" xlink:to="loc_srt_EnergyDomain_019db123-b015-7212-a715-e550d984688e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_019db123-b015-7913-a21e-b16e7f13208d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_019db123-b015-7212-a715-e550d984688e" xlink:to="loc_srt_EnergyDomain_019db123-b015-7913-a21e-b16e7f13208d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CrudeOilMember_019db123-b015-70e4-9125-31bad16f1e29" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CrudeOilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_019db123-b015-7913-a21e-b16e7f13208d" xlink:to="loc_srt_CrudeOilMember_019db123-b015-70e4-9125-31bad16f1e29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_OtherMember_019db123-b015-7531-8ed1-6e710403ed3c" xlink:href="cop-20260331.xsd#cop_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_019db123-b015-7913-a21e-b16e7f13208d" xlink:to="loc_cop_OtherMember_019db123-b015-7531-8ed1-6e710403ed3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019db123-b015-74c4-a9cd-6d01a5dca8b7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ReserveQuantitiesByTypeOfReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019db123-b015-746c-830b-d6acae4b02e3" xlink:to="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019db123-b015-74c4-a9cd-6d01a5dca8b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TypeOfReserveDomain_019db123-b015-74c4-a9cd-6d01a5dca8b7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TypeOfReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019db123-b015-74c4-a9cd-6d01a5dca8b7" xlink:to="loc_srt_TypeOfReserveDomain_019db123-b015-74c4-a9cd-6d01a5dca8b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TypeOfReserveDomain_019db123-b015-747e-9d15-19753edd3d6c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TypeOfReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ReserveQuantitiesByTypeOfReserveAxis_019db123-b015-74c4-a9cd-6d01a5dca8b7" xlink:to="loc_srt_TypeOfReserveDomain_019db123-b015-747e-9d15-19753edd3d6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasReservesMember_019db123-b015-780e-863d-ba5d5b34972b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NaturalGasReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TypeOfReserveDomain_019db123-b015-747e-9d15-19753edd3d6c" xlink:to="loc_srt_NaturalGasReservesMember_019db123-b015-780e-863d-ba5d5b34972b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NaturalGasLiquidsReservesMember_019db123-b015-7011-b714-8c44b11f34e4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NaturalGasLiquidsReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TypeOfReserveDomain_019db123-b015-747e-9d15-19753edd3d6c" xlink:to="loc_srt_NaturalGasLiquidsReservesMember_019db123-b015-7011-b714-8c44b11f34e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019db123-b015-7c74-b6ab-87c92428c3e0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019db123-b015-746c-830b-d6acae4b02e3" xlink:to="loc_srt_ProductOrServiceAxis_019db123-b015-7c74-b6ab-87c92428c3e0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019db123-b015-7c74-b6ab-87c92428c3e0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019db123-b015-7c74-b6ab-87c92428c3e0" xlink:to="loc_srt_ProductsAndServicesDomain_019db123-b015-7c74-b6ab-87c92428c3e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019db123-b015-736f-a0a2-d3d6265abe99" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019db123-b015-7c74-b6ab-87c92428c3e0" xlink:to="loc_srt_ProductsAndServicesDomain_019db123-b015-736f-a0a2-d3d6265abe99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_CrudeOilProductLineMember_019db123-b015-7fcb-9fc7-0581c5fe3044" xlink:href="cop-20260331.xsd#cop_CrudeOilProductLineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019db123-b015-736f-a0a2-d3d6265abe99" xlink:to="loc_cop_CrudeOilProductLineMember_019db123-b015-7fcb-9fc7-0581c5fe3044" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_NaturalGasProductLineMember_019db123-b015-7f4e-8742-dd698ac03fd6" xlink:href="cop-20260331.xsd#cop_NaturalGasProductLineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019db123-b015-736f-a0a2-d3d6265abe99" xlink:to="loc_cop_NaturalGasProductLineMember_019db123-b015-7f4e-8742-dd698ac03fd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cop_PowerMember_019db123-b015-7ec0-9030-fdca5097d0d1" xlink:href="cop-20260331.xsd#cop_PowerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019db123-b015-736f-a0a2-d3d6265abe99" xlink:to="loc_cop_PowerMember_019db123-b015-7ec0-9030-fdca5097d0d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019db123-b015-7616-be07-ea79639bd012" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019db123-b015-7b7f-a3b9-e48d2b4fca48" xlink:to="loc_us-gaap_Revenues_019db123-b015-7616-be07-ea79639bd012" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_019db123-b015-7723-8aa0-ea8b95d9d573" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019db123-b015-7b7f-a3b9-e48d2b4fca48" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_019db123-b015-7723-8aa0-ea8b95d9d573" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationGeographicInformationDetails" xlink:type="simple" xlink:href="cop-20260331.xsd#SegmentDisclosuresandRelatedInformationGeographicInformationDetails"/>
  <link:definitionLink xlink:role="http://www.conocophillips.com/role/SegmentDisclosuresandRelatedInformationGeographicInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019db0c4-356d-795e-9ead-c4f40000acce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019db0c4-356d-70d0-bfa1-be4f7f62d362" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019db0c4-356d-795e-9ead-c4f40000acce" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019db0c4-356d-70d0-bfa1-be4f7f62d362" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019db0c4-356d-7236-bccd-0ee8e8b78d8d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_019db0c4-356d-70d0-bfa1-be4f7f62d362" xlink:to="loc_srt_StatementGeographicalAxis_019db0c4-356d-7236-bccd-0ee8e8b78d8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7236-bccd-0ee8e8b78d8d_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019db0c4-356d-7236-bccd-0ee8e8b78d8d" xlink:to="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7236-bccd-0ee8e8b78d8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7007-8ade-5a4c889ea1eb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019db0c4-356d-7236-bccd-0ee8e8b78d8d" xlink:to="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7007-8ade-5a4c889ea1eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019db0c4-356d-7eba-b266-d096b1f85626" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7007-8ade-5a4c889ea1eb" xlink:to="loc_country_US_019db0c4-356d-7eba-b266-d096b1f85626" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_019db0c4-356d-7cc8-a91a-5566d57d944a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019db0c4-356d-7007-8ade-5a4c889ea1eb" xlink:to="loc_us-gaap_NonUsMember_019db0c4-356d-7cc8-a91a-5566d57d944a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019db0c4-356d-7767-a3d5-bc1d7d971f45" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019db0c4-356d-795e-9ead-c4f40000acce" xlink:to="loc_us-gaap_Revenues_019db0c4-356d-7767-a3d5-bc1d7d971f45" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
