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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e4604-1b26-7da6-92c7-b3d737983fc4,g:300facae-0aec-4593-9263-e55be358cbff-->
<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.dteenergy.com/role/Cover" xlink:type="simple" xlink:href="dte-20260630.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019e4604-201c-7028-aace-309d3503a71e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntitiesTable_019e4604-201c-7028-aace-309d3503a71e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e4604-201c-7c9c-9ec0-5fb8249a1049" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019e4604-201c-7028-aace-309d3503a71e" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e4604-201c-7c9c-9ec0-5fb8249a1049" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7c9c-9ec0-5fb8249a1049_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e4604-201c-7c9c-9ec0-5fb8249a1049" xlink:to="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7c9c-9ec0-5fb8249a1049_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e4604-201c-7c9c-9ec0-5fb8249a1049" xlink:to="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e4604-201c-7414-94b6-d5c72f9bdb3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:to="loc_us-gaap_CommonStockMember_019e4604-201c-7414-94b6-d5c72f9bdb3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SeriesE20175.25JuniorSubordinatedDebenturesDue2077Member_019e4604-201c-7a62-8e8d-9a2556785858" xlink:href="dte-20260630.xsd#dte_SeriesE20175.25JuniorSubordinatedDebenturesDue2077Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:to="loc_dte_SeriesE20175.25JuniorSubordinatedDebenturesDue2077Member_019e4604-201c-7a62-8e8d-9a2556785858" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SeriesG20204375JuniorSubordinatedDebenturesDue2080Member_019e4604-201c-760f-9e40-42e5d4ce2fc0" xlink:href="dte-20260630.xsd#dte_SeriesG20204375JuniorSubordinatedDebenturesDue2080Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:to="loc_dte_SeriesG20204375JuniorSubordinatedDebenturesDue2080Member_019e4604-201c-760f-9e40-42e5d4ce2fc0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SeriesE20214375JuniorSubordinatedDebenturesDue2081Member_019e4604-201c-7955-a664-215f9f2a4a9a" xlink:href="dte-20260630.xsd#dte_SeriesE20214375JuniorSubordinatedDebenturesDue2081Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:to="loc_dte_SeriesE20214375JuniorSubordinatedDebenturesDue2081Member_019e4604-201c-7955-a664-215f9f2a4a9a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SeriesH20256.25JuniorSubordinatedDebenturesDue2085Member_019e4604-201c-7502-a336-40eadab74bfb" xlink:href="dte-20260630.xsd#dte_SeriesH20256.25JuniorSubordinatedDebenturesDue2085Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e4604-201c-7d3f-a6dc-b2e7f248acc7" xlink:to="loc_dte_SeriesH20256.25JuniorSubordinatedDebenturesDue2085Member_019e4604-201c-7502-a336-40eadab74bfb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-201c-7362-9dcc-e3214a115ac5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019e4604-201c-7028-aace-309d3503a71e" xlink:to="loc_dei_LegalEntityAxis_019e4604-201c-7362-9dcc-e3214a115ac5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-201c-7362-9dcc-e3214a115ac5_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-201c-7362-9dcc-e3214a115ac5" xlink:to="loc_dei_EntityDomain_019e4604-201c-7362-9dcc-e3214a115ac5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-201c-72e0-843f-6552ef0e58cb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-201c-7362-9dcc-e3214a115ac5" xlink:to="loc_dei_EntityDomain_019e4604-201c-72e0-843f-6552ef0e58cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-201c-77a4-87f8-7acd31550bd5" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-201c-72e0-843f-6552ef0e58cb" xlink:to="loc_dte_DTEElectricMember_019e4604-201c-77a4-87f8-7acd31550bd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e4604-201c-7039-b70a-16d0012e8914" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentType_019e4604-201c-7039-b70a-16d0012e8914" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e4604-201c-7e2c-8e15-37a407f30f35" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentQuarterlyReport_019e4604-201c-7e2c-8e15-37a407f30f35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e4604-201c-7cac-a3c3-ad0e25c5d0c9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentPeriodEndDate_019e4604-201c-7cac-a3c3-ad0e25c5d0c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e4604-201c-7962-b440-8f81ff517ab3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentTransitionReport_019e4604-201c-7962-b440-8f81ff517ab3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e4604-201c-7248-b7a2-5afed0bc6eea" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityFileNumber_019e4604-201c-7248-b7a2-5afed0bc6eea" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e4604-201c-7579-be20-c1f3e7ea9021" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityRegistrantName_019e4604-201c-7579-be20-c1f3e7ea9021" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e4604-201c-7f8e-b81e-289943a76465" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e4604-201c-7f8e-b81e-289943a76465" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e4604-201c-7735-a7c6-0e619aa5231b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e4604-201c-7735-a7c6-0e619aa5231b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e4604-201c-7112-ba55-c7950b1b3a9b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityAddressAddressLine1_019e4604-201c-7112-ba55-c7950b1b3a9b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e4604-201c-7b6b-974a-9d42476937cd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityAddressCityOrTown_019e4604-201c-7b6b-974a-9d42476937cd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e4604-201c-789a-848d-2d99090a9a3c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityAddressStateOrProvince_019e4604-201c-789a-848d-2d99090a9a3c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e4604-201c-77fd-bad0-962c20784621" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityAddressPostalZipCode_019e4604-201c-77fd-bad0-962c20784621" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e4604-201c-7d7f-93f1-0875e547ddc6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_CityAreaCode_019e4604-201c-7d7f-93f1-0875e547ddc6" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e4604-201c-7408-8abb-fa358a8c06a0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_LocalPhoneNumber_019e4604-201c-7408-8abb-fa358a8c06a0" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e4604-201c-7727-a170-a8fbed1fcad5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_Security12bTitle_019e4604-201c-7727-a170-a8fbed1fcad5" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e4604-201c-7118-86d5-ccc204d76748" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_TradingSymbol_019e4604-201c-7118-86d5-ccc204d76748" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e4604-201c-7bac-add4-2f8d7cb07498" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_SecurityExchangeName_019e4604-201c-7bac-add4-2f8d7cb07498" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e4604-201c-7777-9b59-ad37e6a117f5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityCurrentReportingStatus_019e4604-201c-7777-9b59-ad37e6a117f5" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e4604-201c-7901-8976-914cf27769aa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e4604-201c-7901-8976-914cf27769aa" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e4604-201c-7720-81a0-e52b74a6bbc1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityFilerCategory_019e4604-201c-7720-81a0-e52b74a6bbc1" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e4604-201c-7b1e-afff-135d7bcbba84" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntitySmallBusiness_019e4604-201c-7b1e-afff-135d7bcbba84" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e4604-201c-78d4-81e9-b198c38c7ba7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e4604-201c-78d4-81e9-b198c38c7ba7" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e4604-201c-7af0-bfc5-1598521ee5c5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityShellCompany_019e4604-201c-7af0-bfc5-1598521ee5c5" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e4604-201c-748f-816a-eeb9c93bed20" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e4604-201c-748f-816a-eeb9c93bed20" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e4604-201c-7a49-9625-1260711cd6e7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_EntityCentralIndexKey_019e4604-201c-7a49-9625-1260711cd6e7" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e4604-201c-7284-bfbd-a5502c8555cd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e4604-201c-7284-bfbd-a5502c8555cd" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e4604-201c-7d2e-b10a-34ce39e826af" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentFiscalYearFocus_019e4604-201c-7d2e-b10a-34ce39e826af" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e4604-201c-730c-a19a-207a2ba537a4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e4604-201c-730c-a19a-207a2ba537a4" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e4604-201c-7c3f-bfbc-67c13a543d25" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-201c-7ece-aea6-dc0303e27c01" xlink:to="loc_dei_AmendmentFlag_019e4604-201c-7c3f-bfbc-67c13a543d25" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofChangesinEquityUnauditedDTEEnergyCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofChangesinEquityUnauditedDTEEnergyCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofChangesinEquityUnauditedDTEEnergyCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-71d2-8d03-ac4c99275c18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7d23-b064-d318138b0f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-71d2-8d03-ac4c99275c18" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7d23-b064-d318138b0f2a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-7184-8b00-679851338169" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7d23-b064-d318138b0f2a" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-7184-8b00-679851338169" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e4604-2121-7184-8b00-679851338169_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-7184-8b00-679851338169" xlink:to="loc_us-gaap_EquityComponentDomain_019e4604-2121-7184-8b00-679851338169_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-7184-8b00-679851338169" xlink:to="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e4604-2121-7ac6-8c2c-33dcf506d5ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:to="loc_us-gaap_CommonStockMember_019e4604-2121-7ac6-8c2c-33dcf506d5ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e4604-2121-7b83-887f-3783d2ecf492" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:to="loc_us-gaap_RetainedEarningsMember_019e4604-2121-7b83-887f-3783d2ecf492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e4604-2121-70fc-9cc6-fa8f49ba53b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e4604-2121-70fc-9cc6-fa8f49ba53b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019e4604-2121-7beb-b6ae-8cf398d512a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7607-9f7d-1943144130e2" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019e4604-2121-7beb-b6ae-8cf398d512a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-71d2-8d03-ac4c99275c18" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7570-aba0-c9fe851fd0a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7570-aba0-c9fe851fd0a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e4604-2121-71a6-8d22-c710517bc6df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e4604-2121-71a6-8d22-c710517bc6df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-2121-7616-b6f9-cce5c1ebd7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-2121-7616-b6f9-cce5c1ebd7b7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_019e4604-2121-7563-8e37-1d4fa2129891" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_DividendsCommonStockCash_019e4604-2121-7563-8e37-1d4fa2129891" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019e4604-2121-7135-840f-bd14df2ce569" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_019e4604-2121-7135-840f-bd14df2ce569" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019e4604-2121-706d-9c8a-dfcb59e97d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_019e4604-2121-706d-9c8a-dfcb59e97d9c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e4604-2121-7a1a-a4b8-f9a0852f0d59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e4604-2121-7a1a-a4b8-f9a0852f0d59" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOtherShares_019e4604-2121-7cf1-99e5-52749c17a3df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityOtherShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_StockholdersEquityOtherShares_019e4604-2121-7cf1-99e5-52749c17a3df" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_019e4604-2121-7f18-adec-55f8b51844e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7be9-b9b4-acb90cbaf7f9" xlink:to="loc_us-gaap_StockholdersEquityOther_019e4604-2121-7f18-adec-55f8b51844e1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-71cd-afd7-f2afeb566ff9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e4604-2121-7575-9606-23766b3a94f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofOperationsUnauditedDTEElectricCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofOperationsUnauditedDTEElectricCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofOperationsUnauditedDTEElectricCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7d27-a1ba-e87a4ffd61fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7d27-a1ba-e87a4ffd61fb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-764f-8094-c7e8a4773c8d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7d27-a1ba-e87a4ffd61fb" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-764f-8094-c7e8a4773c8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-764f-8094-c7e8a4773c8d_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-764f-8094-c7e8a4773c8d" xlink:to="loc_dei_EntityDomain_019e4604-2121-764f-8094-c7e8a4773c8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-77c7-8a93-cc033f101e65" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-764f-8094-c7e8a4773c8d" xlink:to="loc_dei_EntityDomain_019e4604-2121-77c7-8a93-cc033f101e65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7926-b359-e9b7dcbd1d57" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-77c7-8a93-cc033f101e65" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7926-b359-e9b7dcbd1d57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedOperatingRevenue_019e4604-2121-775d-8ca3-2a616c5dfd14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_RegulatedOperatingRevenue_019e4604-2121-775d-8ca3-2a616c5dfd14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseProductsAndServices_019e4604-2121-7447-807e-4a11845009da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseProductsAndServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseProductsAndServices_019e4604-2121-7447-807e-4a11845009da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_019e4604-2121-7e03-b079-03b53ec1cf1c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseMaintenanceAndOperations_019e4604-2121-7e03-b079-03b53ec1cf1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_019e4604-2121-7b24-8190-95312d970ea6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization_019e4604-2121-7b24-8190-95312d970ea6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_019e4604-2121-70b4-babf-6b6038013250" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxesExcludingIncomeAndExciseTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_TaxesExcludingIncomeAndExciseTaxes_019e4604-2121-70b4-babf-6b6038013250" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_019e4604-2121-7942-97a8-6f06f4eb7626" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges_019e4604-2121-7942-97a8-6f06f4eb7626" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019e4604-2121-7abb-abf4-2b974a924c6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingExpensesAbstract_019e4604-2121-7583-a807-31369bd6ee67" xlink:to="loc_us-gaap_CostsAndExpenses_019e4604-2121-7abb-abf4-2b974a924c6a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019e4604-2121-754c-8a61-7c131d6b2dac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_OperatingIncomeLoss_019e4604-2121-754c-8a61-7c131d6b2dac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019e4604-2121-7697-a201-e12ed2aaf3cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019e4604-2121-7697-a201-e12ed2aaf3cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019e4604-2121-78c4-98ab-5412a05be9da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019e4604-2121-78c4-98ab-5412a05be9da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_019e4604-2121-7c66-ac19-38d867d3ae76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent_019e4604-2121-7c66-ac19-38d867d3ae76" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncome_019e4604-2121-71d3-b1b3-ad03cca26f7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_OtherNonoperatingIncome_019e4604-2121-71d3-b1b3-ad03cca26f7e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingExpense_019e4604-2121-7390-a99e-c8a2e5174c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_OtherNonoperatingExpense_019e4604-2121-7390-a99e-c8a2e5174c1b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_019e4604-2121-7ebf-9bb3-73f46c8a0bcd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherNonoperatingIncomeExpenseAbstract_019e4604-2121-7862-a992-a2b608bd103a" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_019e4604-2121-7ebf-9bb3-73f46c8a0bcd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e4604-2121-7daa-b77d-924b513bb611" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e4604-2121-7daa-b77d-924b513bb611" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e4604-2121-7fd1-ad2c-babcdc914a2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e4604-2121-7fd1-ad2c-babcdc914a2d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-2121-70bc-a45c-bcf299b6a82b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7860-913a-e635ef138901" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-2121-70bc-a45c-bcf299b6a82b" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofComprehensiveIncomeUnauditedDTEElectricCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofComprehensiveIncomeUnauditedDTEElectricCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofComprehensiveIncomeUnauditedDTEElectricCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-7f1a-891d-b0df9ac009ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-73fd-899f-3eefbd83abd4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7f1a-891d-b0df9ac009ef" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-73fd-899f-3eefbd83abd4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-70ea-bee5-8de81eb21333" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-73fd-899f-3eefbd83abd4" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-70ea-bee5-8de81eb21333" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-70ea-bee5-8de81eb21333_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-70ea-bee5-8de81eb21333" xlink:to="loc_dei_EntityDomain_019e4604-2121-70ea-bee5-8de81eb21333_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7d6a-9ceb-104e02824e51" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-70ea-bee5-8de81eb21333" xlink:to="loc_dei_EntityDomain_019e4604-2121-7d6a-9ceb-104e02824e51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7f5d-a666-9b735809d386" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7d6a-9ceb-104e02824e51" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7f5d-a666-9b735809d386" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-2121-75e2-8338-4f164fb6dc84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7f1a-891d-b0df9ac009ef" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-2121-75e2-8338-4f164fb6dc84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e4604-2121-775a-a5a3-f1d42f3c1953" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7f1a-891d-b0df9ac009ef" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019e4604-2121-775a-a5a3-f1d42f3c1953" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e4604-2121-7654-a80f-0653bbbedd35" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7f1a-891d-b0df9ac009ef" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_019e4604-2121-7654-a80f-0653bbbedd35" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-72f0-9cd1-28ea64115f82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7aa5-91a6-0bf3d6f776da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-72f0-9cd1-28ea64115f82" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7aa5-91a6-0bf3d6f776da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7c08-bea6-4c9c42c8df8a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7aa5-91a6-0bf3d6f776da" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7c08-bea6-4c9c42c8df8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7c08-bea6-4c9c42c8df8a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7c08-bea6-4c9c42c8df8a" xlink:to="loc_dei_EntityDomain_019e4604-2121-7c08-bea6-4c9c42c8df8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-718b-b27b-1b7750b0a53b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7c08-bea6-4c9c42c8df8a" xlink:to="loc_dei_EntityDomain_019e4604-2121-718b-b27b-1b7750b0a53b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7502-83f8-f3d65d6faf93" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-718b-b27b-1b7750b0a53b" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7502-83f8-f3d65d6faf93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-755c-8a48-c6c1bed4eeae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7aa5-91a6-0bf3d6f776da" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-755c-8a48-c6c1bed4eeae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-755c-8a48-c6c1bed4eeae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-755c-8a48-c6c1bed4eeae" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-755c-8a48-c6c1bed4eeae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7c61-9301-22e51894e4e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-755c-8a48-c6c1bed4eeae" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7c61-9301-22e51894e4e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019e4604-2121-7288-a012-b0181b930878" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7c61-9301-22e51894e4e1" xlink:to="loc_us-gaap_NonrelatedPartyMember_019e4604-2121-7288-a012-b0181b930878" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019e4604-2121-7f42-9ec1-3c6ff6a0c5cc" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7c61-9301-22e51894e4e1" xlink:to="loc_srt_AffiliatedEntityMember_019e4604-2121-7f42-9ec1-3c6ff6a0c5cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-72f0-9cd1-28ea64115f82" xlink:to="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e4604-2121-7bb6-b7c6-078bddf15c16" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e4604-2121-7bb6-b7c6-078bddf15c16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_019e4604-2121-792d-a5e7-6a60b1df10ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_019e4604-2121-792d-a5e7-6a60b1df10ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrentAbstract_019e4604-2121-7157-a6d1-6c10d78335af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_AccountsReceivableNetCurrentAbstract_019e4604-2121-7157-a6d1-6c10d78335af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019e4604-2121-7af5-a53b-086355625772" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsReceivableNetCurrentAbstract_019e4604-2121-7157-a6d1-6c10d78335af" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019e4604-2121-7af5-a53b-086355625772" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_019e4604-2121-7188-8fe1-efc42162ae00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsReceivableNetCurrentAbstract_019e4604-2121-7157-a6d1-6c10d78335af" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_019e4604-2121-7188-8fe1-efc42162ae00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNetAbstract_019e4604-2121-75ed-8647-acce69ab897f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_InventoryNetAbstract_019e4604-2121-75ed-8647-acce69ab897f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnergyRelatedInventory_019e4604-2121-706a-a14f-4251890f4ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnergyRelatedInventory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryNetAbstract_019e4604-2121-75ed-8647-acce69ab897f" xlink:to="loc_us-gaap_EnergyRelatedInventory_019e4604-2121-706a-a14f-4251890f4ddd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsAndSupplies_019e4604-2121-752e-862a-150243ca84a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterialsAndSupplies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryNetAbstract_019e4604-2121-75ed-8647-acce69ab897f" xlink:to="loc_us-gaap_InventoryRawMaterialsAndSupplies_019e4604-2121-752e-862a-150243ca84a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019e4604-2121-7373-a74c-003e7de0f043" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019e4604-2121-7373-a74c-003e7de0f043" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsCurrent_019e4604-2121-7bd8-a4cf-00b7a08f19cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_RegulatoryAssetsCurrent_019e4604-2121-7bd8-a4cf-00b7a08f19cd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019e4604-2121-77d2-a142-3565eeb0d6a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_OtherAssetsCurrent_019e4604-2121-77d2-a142-3565eeb0d6a4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019e4604-2121-737f-8f0b-4cd67a861777" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-79dc-b688-61747250046e" xlink:to="loc_us-gaap_AssetsCurrent_019e4604-2121-737f-8f0b-4cd67a861777" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestmentsAbstract_019e4604-2121-72b8-b6cc-1d10ccdab665" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermInvestmentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:to="loc_us-gaap_LongTermInvestmentsAbstract_019e4604-2121-72b8-b6cc-1d10ccdab665" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecommissioningFundInvestments_019e4604-2121-71a5-8a3f-322fa1181e9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DecommissioningFundInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermInvestmentsAbstract_019e4604-2121-72b8-b6cc-1d10ccdab665" xlink:to="loc_us-gaap_DecommissioningFundInvestments_019e4604-2121-71a5-8a3f-322fa1181e9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_019e4604-2121-762d-b3e4-3c62c6f6c9d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermInvestmentsAbstract_019e4604-2121-72b8-b6cc-1d10ccdab665" xlink:to="loc_us-gaap_OtherLongTermInvestments_019e4604-2121-762d-b3e4-3c62c6f6c9d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_019e4604-2121-7389-81cb-24cba950c996" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermInvestmentsAbstract_019e4604-2121-72b8-b6cc-1d10ccdab665" xlink:to="loc_us-gaap_LongTermInvestments_019e4604-2121-7389-81cb-24cba950c996" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_019e4604-2121-746c-895a-98e62601e604" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_019e4604-2121-746c-895a-98e62601e604" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019e4604-2121-7c4d-bb04-e87b6ba28830" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_019e4604-2121-746c-895a-98e62601e604" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019e4604-2121-7c4d-bb04-e87b6ba28830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e4604-2121-7889-9bd7-356d1149a6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_019e4604-2121-746c-895a-98e62601e604" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019e4604-2121-7889-9bd7-356d1149a6a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019e4604-2121-7dd9-9da9-9d18dd5ae20b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_019e4604-2121-746c-895a-98e62601e604" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019e4604-2121-7dd9-9da9-9d18dd5ae20b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:to="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAssetsNoncurrent_019e4604-2121-7f1f-8d5e-91a575fff5f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_us-gaap_RegulatoryAssetsNoncurrent_019e4604-2121-7f1f-8d5e-91a575fff5f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizedRegulatoryAssetsNoncurrent_019e4604-2121-7fb2-a0ad-fb5f09b54fce" xlink:href="dte-20260630.xsd#dte_SecuritizedRegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_dte_SecuritizedRegulatoryAssetsNoncurrent_019e4604-2121-7fb2-a0ad-fb5f09b54fce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PrepaidPostretirementCosts_019e4604-2121-7d6e-a8f7-e7394a52d84e" xlink:href="dte-20260630.xsd#dte_PrepaidPostretirementCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_dte_PrepaidPostretirementCosts_019e4604-2121-7d6e-a8f7-e7394a52d84e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e4604-2121-763a-b29a-a1d3692dcf39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019e4604-2121-763a-b29a-a1d3692dcf39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019e4604-2121-7bc6-8908-eeac290fafa7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_019e4604-2121-7bc6-8908-eeac290fafa7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019e4604-2121-7ed2-97d9-228e6e27cbf1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatedEntityOtherAssetsNoncurrentAbstract_019e4604-2121-7ff4-b2e7-38bf1a753c1a" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019e4604-2121-7ed2-97d9-228e6e27cbf1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e4604-2121-7455-b258-b11e26117e7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7b47-9b7d-b9ec4677144f" xlink:to="loc_us-gaap_Assets_019e4604-2121-7455-b258-b11e26117e7c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-72f0-9cd1-28ea64115f82" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrentAndNoncurrentAbstract_019e4604-2121-7d0a-8629-9921fc3fc593" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrentAndNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_AccountsPayableCurrentAndNoncurrentAbstract_019e4604-2121-7d0a-8629-9921fc3fc593" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019e4604-2121-715b-8daa-0fefd231a691" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsPayableCurrentAndNoncurrentAbstract_019e4604-2121-7d0a-8629-9921fc3fc593" xlink:to="loc_us-gaap_AccountsPayableCurrent_019e4604-2121-715b-8daa-0fefd231a691" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_019e4604-2121-7e22-84cd-7044a1a7c73c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_InterestPayableCurrent_019e4604-2121-7e22-84cd-7044a1a7c73c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019e4604-2121-7291-8c50-69662da0ea7d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019e4604-2121-7291-8c50-69662da0ea7d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_019e4604-2121-765d-8288-a751ee0ee61d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_019e4604-2121-765d-8288-a751ee0ee61d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowingsAbstract_019e4604-2121-7691-aed4-a1a1cb908712" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowingsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_ShortTermBorrowingsAbstract_019e4604-2121-7691-aed4-a1a1cb908712" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019e4604-2121-7043-8f3d-d0c78af44bfc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermBorrowingsAbstract_019e4604-2121-7691-aed4-a1a1cb908712" xlink:to="loc_us-gaap_ShortTermBorrowings_019e4604-2121-7043-8f3d-d0c78af44bfc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019e4604-2121-7179-a96a-6f4e97b73982" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019e4604-2121-7179-a96a-6f4e97b73982" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesCurrent_019e4604-2121-762b-9803-3167f6264f0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_OtherLiabilitiesCurrent_019e4604-2121-762b-9803-3167f6264f0f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019e4604-2121-7892-bb13-bf9386d06177" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_019e4604-2121-717a-a4a1-824e178d5db2" xlink:to="loc_us-gaap_LiabilitiesCurrent_019e4604-2121-7892-bb13-bf9386d06177" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermDebtNoncurrent_019e4604-2121-7b36-b0b2-a5456d2b1863" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:to="loc_us-gaap_OtherLongTermDebtNoncurrent_019e4604-2121-7b36-b0b2-a5456d2b1863" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBondsNoncurrent_019e4604-2121-71f9-a2c7-46fe80ab066d" xlink:href="dte-20260630.xsd#dte_SecuritizationBondsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:to="loc_dte_SecuritizationBondsNoncurrent_019e4604-2121-71f9-a2c7-46fe80ab066d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019e4604-2121-720b-83b0-91315c68b395" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_019e4604-2121-720b-83b0-91315c68b395" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019e4604-2121-711c-9e49-476d88d903cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsAbstract_019e4604-2121-7163-ad34-5e0a2322ece8" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019e4604-2121-711c-9e49-476d88d903cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019e4604-2121-72a4-87a1-5136ef40c1e4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_019e4604-2121-72a4-87a1-5136ef40c1e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityNoncurrent_019e4604-2121-7e8f-92de-3ccea351df58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_RegulatoryLiabilityNoncurrent_019e4604-2121-7e8f-92de-3ccea351df58" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e4604-2121-74c5-bb54-0adff8c070f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e4604-2121-74c5-bb54-0adff8c070f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDeferredInvestmentTaxCredit_019e4604-2121-7eb4-8ac3-c4760960fb04" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDeferredInvestmentTaxCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_AccumulatedDeferredInvestmentTaxCredit_019e4604-2121-7eb4-8ac3-c4760960fb04" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_019e4604-2121-7217-bfc8-25d82d86f58a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_AccruedEnvironmentalLossContingenciesNoncurrent_019e4604-2121-7217-bfc8-25d82d86f58a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_019e4604-2121-7f3b-a9c1-d131f9edbf22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_DefinedBenefitPensionPlanLiabilitiesNoncurrent_019e4604-2121-7f3b-a9c1-d131f9edbf22" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_019e4604-2121-782a-bf30-4bb2fcdd5830" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent_019e4604-2121-782a-bf30-4bb2fcdd5830" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e4604-2121-7cfa-b10c-320e850358be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019e4604-2121-7cfa-b10c-320e850358be" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_019e4604-2121-7b3e-b799-5139ea448506" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherSundryLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_OtherSundryLiabilitiesNoncurrent_019e4604-2121-7b3e-b799-5139ea448506" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019e4604-2121-7a33-b267-4a0e2acb758a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherLiabilitiesNoncurrentAbstract_019e4604-2121-7bed-8bf5-e7e44267f440" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019e4604-2121-7a33-b267-4a0e2acb758a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019e4604-2121-75dc-bdbc-1cd0647b473c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019e4604-2121-75dc-bdbc-1cd0647b473c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_019e4604-2121-7508-baef-45521f9199d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_StockholdersEquityAbstract_019e4604-2121-7508-baef-45521f9199d0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019e4604-2121-7aa4-9698-944c24464a1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e4604-2121-7508-baef-45521f9199d0" xlink:to="loc_us-gaap_CommonStockValue_019e4604-2121-7aa4-9698-944c24464a1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e4604-2121-79b0-ab00-edf523f95600" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e4604-2121-7508-baef-45521f9199d0" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019e4604-2121-79b0-ab00-edf523f95600" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e4604-2121-752b-9cdf-64dbba6f3e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_019e4604-2121-7508-baef-45521f9199d0" xlink:to="loc_us-gaap_StockholdersEquity_019e4604-2121-752b-9cdf-64dbba6f3e0f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e4604-2121-7c75-90b7-4b221a91007f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_019e4604-2121-7fa5-a91b-6622d1bf8a96" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_019e4604-2121-7c75-90b7-4b221a91007f" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompanyParenthetical" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompanyParenthetical"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofFinancialPositionUnauditedDTEElectricCompanyParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-70ac-be77-ca0046404b1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7a15-8a93-daaf4b78c2b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-70ac-be77-ca0046404b1b" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7a15-8a93-daaf4b78c2b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-73df-b16a-b8c0d02e1f74" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7a15-8a93-daaf4b78c2b2" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-73df-b16a-b8c0d02e1f74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-73df-b16a-b8c0d02e1f74_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-73df-b16a-b8c0d02e1f74" xlink:to="loc_dei_EntityDomain_019e4604-2121-73df-b16a-b8c0d02e1f74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7526-9b36-eea8ad418cf2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-73df-b16a-b8c0d02e1f74" xlink:to="loc_dei_EntityDomain_019e4604-2121-7526-9b36-eea8ad418cf2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-75e5-a9a0-24d6931aac95" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7526-9b36-eea8ad418cf2" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-75e5-a9a0-24d6931aac95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-704b-b2af-9db839a13898" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-70ac-be77-ca0046404b1b" xlink:to="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-704b-b2af-9db839a13898" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019e4604-2121-7515-a1a8-180a44a1a9b0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_019e4604-2121-704b-b2af-9db839a13898" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent_019e4604-2121-7515-a1a8-180a44a1a9b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-70ac-be77-ca0046404b1b" xlink:to="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e4604-2121-74d4-8207-254817d4e237" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019e4604-2121-74d4-8207-254817d4e237" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019e4604-2121-777a-afec-392413c4faf5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019e4604-2121-777a-afec-392413c4faf5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_019e4604-2121-7896-a24f-be7c0c4fcf6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:to="loc_us-gaap_CommonStockSharesIssued_019e4604-2121-7896-a24f-be7c0c4fcf6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7deb-9410-b1a1e4a3450d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_019e4604-2121-72d8-afe9-d2d16d8e8eda" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7deb-9410-b1a1e4a3450d" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofCashFlowsUnauditedDTEElectricCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofCashFlowsUnauditedDTEElectricCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofCashFlowsUnauditedDTEElectricCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7e9c-86ba-3c98b03a7c76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7e9c-86ba-3c98b03a7c76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7f92-b8df-f3e1a6a62f55" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7e9c-86ba-3c98b03a7c76" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7f92-b8df-f3e1a6a62f55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7f92-b8df-f3e1a6a62f55_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7f92-b8df-f3e1a6a62f55" xlink:to="loc_dei_EntityDomain_019e4604-2121-7f92-b8df-f3e1a6a62f55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7d42-a661-9cff37083a95" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7f92-b8df-f3e1a6a62f55" xlink:to="loc_dei_EntityDomain_019e4604-2121-7d42-a661-9cff37083a95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-728a-baaa-0c0bd644c726" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7d42-a661-9cff37083a95" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-728a-baaa-0c0bd644c726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7172-beb3-ee929b091dc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7e9c-86ba-3c98b03a7c76" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7172-beb3-ee929b091dc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7172-beb3-ee929b091dc2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7172-beb3-ee929b091dc2" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7172-beb3-ee929b091dc2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7445-a306-5aaf96f07aaa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7172-beb3-ee929b091dc2" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7445-a306-5aaf96f07aaa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019e4604-2121-7b62-b90d-73512b57a995" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7445-a306-5aaf96f07aaa" xlink:to="loc_srt_AffiliatedEntityMember_019e4604-2121-7b62-b90d-73512b57a995" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonrelatedPartyMember_019e4604-2121-7566-810e-064430e9f347" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonrelatedPartyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7445-a306-5aaf96f07aaa" xlink:to="loc_us-gaap_NonrelatedPartyMember_019e4604-2121-7566-810e-064430e9f347" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7393-8db6-ed7dd1ee95e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7393-8db6-ed7dd1ee95e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-2121-78fe-bdf5-0f6e726d6fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7393-8db6-ed7dd1ee95e3" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-2121-78fe-bdf5-0f6e726d6fb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7393-8db6-ed7dd1ee95e3" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019e4604-2121-7fed-94fe-20c62aac6362" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019e4604-2121-7fed-94fe-20c62aac6362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearFuelAmortization_019e4604-2121-759b-9f5e-6530a9c9a41d" xlink:href="dte-20260630.xsd#dte_NuclearFuelAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_dte_NuclearFuelAmortization_019e4604-2121-759b-9f5e-6530a9c9a41d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019e4604-2121-7ca4-9fd1-35f8ba0d8d05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019e4604-2121-7ca4-9fd1-35f8ba0d8d05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e4604-2121-7022-9197-5e8ccd69014e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_019e4604-2121-7022-9197-5e8ccd69014e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GainLossOnSaleOfAssetsAndAssetImpairmentChargesNet_019e4604-2121-74a8-88d1-736e336b554d" xlink:href="dte-20260630.xsd#dte_GainLossOnSaleOfAssetsAndAssetImpairmentChargesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_dte_GainLossOnSaleOfAssetsAndAssetImpairmentChargesNet_019e4604-2121-74a8-88d1-736e336b554d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7bc1-b8e1-c417be96902a" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_019e4604-2121-76c8-9152-5ed13ce32b90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables_019e4604-2121-76c8-9152-5ed13ce32b90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019e4604-2121-7396-8792-b361b7b60d0d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019e4604-2121-7396-8792-b361b7b60d0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019e4604-2121-7f5a-9847-40a2002e4723" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_019e4604-2121-7f5a-9847-40a2002e4723" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IncreaseDecreaseInPrepaidPostretirementCostsAffiliates_019e4604-2121-7364-bd14-e14c1acd4cf4" xlink:href="dte-20260630.xsd#dte_IncreaseDecreaseInPrepaidPostretirementCostsAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_dte_IncreaseDecreaseInPrepaidPostretirementCostsAffiliates_019e4604-2121-7364-bd14-e14c1acd4cf4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IncreaseDecreaseInPensionPlanObligationsAffiliates_019e4604-2121-7d5f-b85e-d4c07df6a1fb" xlink:href="dte-20260630.xsd#dte_IncreaseDecreaseInPensionPlanObligationsAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_dte_IncreaseDecreaseInPensionPlanObligationsAffiliates_019e4604-2121-7d5f-b85e-d4c07df6a1fb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IncreaseDecreaseInPostretirementObligationsAffiliates_019e4604-2121-7d54-a5cb-9d6e18958fae" xlink:href="dte-20260630.xsd#dte_IncreaseDecreaseInPostretirementObligationsAffiliates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_dte_IncreaseDecreaseInPostretirementObligationsAffiliates_019e4604-2121-7d54-a5cb-9d6e18958fae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities_019e4604-2121-7bc9-9d09-48a2c1572786" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_us-gaap_IncreaseDecreaseInRegulatoryAssetsAndLiabilities_019e4604-2121-7bc9-9d09-48a2c1572786" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_019e4604-2121-7fc5-a7c7-fc32fb31496f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_019e4604-2121-7e73-94a3-c02be539be53" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_019e4604-2121-7fc5-a7c7-fc32fb31496f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e4604-2121-78b3-bb6f-6a5311732f1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_019e4604-2121-7393-8db6-ed7dd1ee95e3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019e4604-2121-78b3-bb6f-6a5311732f1f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e4604-2121-70ef-9750-15ad6058ccea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019e4604-2121-70ef-9750-15ad6058ccea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments_019e4604-2121-7e01-a014-4b380435e436" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfOtherInvestments_019e4604-2121-7e01-a014-4b380435e436" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireOtherInvestments_019e4604-2121-76ec-974a-2e3f16cf300a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireOtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_PaymentsToAcquireOtherInvestments_019e4604-2121-76ec-974a-2e3f16cf300a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireNotesReceivable_019e4604-2121-7502-b6ec-5d78cbeadeb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_PaymentsToAcquireNotesReceivable_019e4604-2121-7502-b6ec-5d78cbeadeb7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DistributionsToContributionsFromAffiliatesForNotesReceivables_019f5f32-c457-7a04-9e30-53e979bd3086" xlink:href="dte-20260630.xsd#dte_DistributionsToContributionsFromAffiliatesForNotesReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_dte_DistributionsToContributionsFromAffiliatesForNotesReceivables_019f5f32-c457-7a04-9e30-53e979bd3086" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019e4604-2121-7bb4-8ce6-c25f530108d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019e4604-2121-7bb4-8ce6-c25f530108d9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e4604-2121-7e8a-8f0b-c95e1f21082d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_019e4604-2121-7ee3-aa45-d7d00c31feb7" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019e4604-2121-7e8a-8f0b-c95e1f21082d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e4604-2121-7a5a-af24-1ad4a4f4ef18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_019e4604-2121-7a5a-af24-1ad4a4f4ef18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019e4604-2121-7b0f-8fd4-086433bb74d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019e4604-2121-7b0f-8fd4-086433bb74d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019e4604-2121-7df8-bab1-9331cca0ca5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromRepaymentsOfShortTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_ProceedsFromRepaymentsOfShortTermDebt_019e4604-2121-7df8-bab1-9331cca0ca5e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_019e4604-2121-7af4-a645-435627aa1676" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_019e4604-2121-7af4-a645-435627aa1676" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019e4604-2121-7ac3-a978-26b2e8783b53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_019e4604-2121-7ac3-a978-26b2e8783b53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e4604-2121-7db4-b36b-5bb84447863a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_019e4604-2121-7994-bf8e-c11c2adcfd59" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019e4604-2121-7db4-b36b-5bb84447863a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e4604-2121-7021-8956-f7ee7d94aec1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019e4604-2121-7021-8956-f7ee7d94aec1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e4604-2121-7a0f-bbc7-c719660b34cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e4604-2121-7a0f-bbc7-c719660b34cf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019e4604-2121-7cc7-b49a-685c75a6fd8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019e4604-2121-7550-8509-79d9477b774f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-7551-abdb-caa51f022956" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019e4604-2121-7550-8509-79d9477b774f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019e4604-2121-7a3e-8b76-c6014e55b66a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_019e4604-2121-7550-8509-79d9477b774f" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_019e4604-2121-7a3e-8b76-c6014e55b66a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ConsolidatedStatementsofChangesinShareholdersEquityUnauditedDTEElectricCompany" xlink:type="simple" xlink:href="dte-20260630.xsd#ConsolidatedStatementsofChangesinShareholdersEquityUnauditedDTEElectricCompany"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ConsolidatedStatementsofChangesinShareholdersEquityUnauditedDTEElectricCompany" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e4604-2121-713b-89ba-fdb00eb888f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e4604-2121-7576-aa0d-9e094ac6ddb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-713b-89ba-fdb00eb888f0" xlink:to="loc_us-gaap_StatementTable_019e4604-2121-7576-aa0d-9e094ac6ddb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-720e-826a-e9f00b9ef349" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7576-aa0d-9e094ac6ddb2" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-720e-826a-e9f00b9ef349" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-720e-826a-e9f00b9ef349_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-720e-826a-e9f00b9ef349" xlink:to="loc_dei_EntityDomain_019e4604-2121-720e-826a-e9f00b9ef349_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7b09-87cc-f2d69be11eee" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-720e-826a-e9f00b9ef349" xlink:to="loc_dei_EntityDomain_019e4604-2121-7b09-87cc-f2d69be11eee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7df1-8b0e-6a7b1e942d8d" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7b09-87cc-f2d69be11eee" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7df1-8b0e-6a7b1e942d8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-786c-9edb-212590dffd4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e4604-2121-7576-aa0d-9e094ac6ddb2" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-786c-9edb-212590dffd4d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e4604-2121-786c-9edb-212590dffd4d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-786c-9edb-212590dffd4d" xlink:to="loc_us-gaap_EquityComponentDomain_019e4604-2121-786c-9edb-212590dffd4d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e4604-2121-7f40-bd74-2a16d63bacb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e4604-2121-786c-9edb-212590dffd4d" xlink:to="loc_us-gaap_EquityComponentDomain_019e4604-2121-7f40-bd74-2a16d63bacb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e4604-2121-7a38-971c-3951c696afb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7f40-bd74-2a16d63bacb5" xlink:to="loc_us-gaap_CommonStockMember_019e4604-2121-7a38-971c-3951c696afb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e4604-2121-7272-bbf2-9ea40ed86998" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7f40-bd74-2a16d63bacb5" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e4604-2121-7272-bbf2-9ea40ed86998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e4604-2121-7074-b8fd-bb6d3cfed0ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e4604-2121-7f40-bd74-2a16d63bacb5" xlink:to="loc_us-gaap_RetainedEarningsMember_019e4604-2121-7074-b8fd-bb6d3cfed0ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e4604-2121-713b-89ba-fdb00eb888f0" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7485-8713-87a76d247991" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7485-8713-87a76d247991" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e4604-2121-7075-aa3a-0b6428e5ca0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:to="loc_us-gaap_StockholdersEquity_019e4604-2121-7075-aa3a-0b6428e5ca0f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-2121-7cce-a7fe-3ce4cccfffd7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-2121-7cce-a7fe-3ce4cccfffd7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_019ed022-9b21-768b-80c4-9e9f68a4f8d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e4604-2121-7d09-b909-a15f37d89cc1" xlink:to="loc_us-gaap_DividendsCommonStockCash_019ed022-9b21-768b-80c4-9e9f68a4f8d2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e4604-2121-7e88-be4a-b77e29789101" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019e4604-2121-73bf-8381-30e23e487748" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/OrganizationandBasisofPresentationDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#OrganizationandBasisofPresentationDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/OrganizationandBasisofPresentationDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e0b-ba63-8dc9102c36e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e0b-ba63-8dc9102c36e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7946-a1dc-ba374d83e761" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e0b-ba63-8dc9102c36e3" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7946-a1dc-ba374d83e761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7946-a1dc-ba374d83e761_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7946-a1dc-ba374d83e761" xlink:to="loc_dei_EntityDomain_019e4604-2121-7946-a1dc-ba374d83e761_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7985-83ed-f7a35b682ff8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7946-a1dc-ba374d83e761" xlink:to="loc_dei_EntityDomain_019e4604-2121-7985-83ed-f7a35b682ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7b89-92d4-2dc7482338f3" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7985-83ed-f7a35b682ff8" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7b89-92d4-2dc7482338f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-7e86-b443-1f6030f6981d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e0b-ba63-8dc9102c36e3" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-7e86-b443-1f6030f6981d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7e86-b443-1f6030f6981d_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-7e86-b443-1f6030f6981d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7e86-b443-1f6030f6981d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7833-a313-3633a4ab66ae" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-7e86-b443-1f6030f6981d" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7833-a313-3633a4ab66ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e4604-2121-703a-8b9f-f700b81270f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7833-a313-3633a4ab66ae" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_019e4604-2121-703a-8b9f-f700b81270f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NumberOfElectricUtilityCustomers_019e4604-2121-7e91-bf56-fefc97424f61" xlink:href="dte-20260630.xsd#dte_NumberOfElectricUtilityCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:to="loc_dte_NumberOfElectricUtilityCustomers_019e4604-2121-7e91-bf56-fefc97424f61" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NumberOfGasUtilityCustomers_019e4604-2121-749b-bfaf-395efa4f43c5" xlink:href="dte-20260630.xsd#dte_NumberOfGasUtilityCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:to="loc_dte_NumberOfGasUtilityCustomers_019e4604-2121-749b-bfaf-395efa4f43c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019e4604-2121-7b6c-99b3-f10f9c98de6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_019e4604-2121-7b6c-99b3-f10f9c98de6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e4604-2121-7999-bba3-cd561ae4703f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7e94-b252-185a92f2a311" xlink:to="loc_us-gaap_EquityMethodInvestments_019e4604-2121-7999-bba3-cd561ae4703f" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/OrganizationandBasisofPresentationConsolidatedVariableInterestEntitiesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#OrganizationandBasisofPresentationConsolidatedVariableInterestEntitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/OrganizationandBasisofPresentationConsolidatedVariableInterestEntitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e15-9747-b6faf744637c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfVariableInterestEntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:to="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e15-9747-b6faf744637c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-73ce-ada8-cff1e9295232" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e15-9747-b6faf744637c" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-73ce-ada8-cff1e9295232" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-73ce-ada8-cff1e9295232_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-73ce-ada8-cff1e9295232" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-73ce-ada8-cff1e9295232_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7f4e-adad-3461afc5693c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-2121-73ce-ada8-cff1e9295232" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7f4e-adad-3461afc5693c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e4604-2121-708c-b4c8-e607bb9c222a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e4604-2121-7f4e-adad-3461afc5693c" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_019e4604-2121-708c-b4c8-e607bb9c222a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7ce5-bbc2-7348769fd26e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfVariableInterestEntitiesTable_019e4604-2121-7e15-9747-b6faf744637c" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7ce5-bbc2-7348769fd26e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7ce5-bbc2-7348769fd26e_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7ce5-bbc2-7348769fd26e" xlink:to="loc_dei_EntityDomain_019e4604-2121-7ce5-bbc2-7348769fd26e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7c2a-9a71-20d2233d547a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7ce5-bbc2-7348769fd26e" xlink:to="loc_dei_EntityDomain_019e4604-2121-7c2a-9a71-20d2233d547a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7581-ad60-6901a780989c" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7c2a-9a71-20d2233d547a" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7581-ad60-6901a780989c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:to="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e4604-2121-7ba1-81fd-c0c8aeb856b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019e4604-2121-7ba1-81fd-c0c8aeb856b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_019e4604-2121-78a4-b292-1bf64769cd52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_019e4604-2121-78a4-b292-1bf64769cd52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019e4604-2121-7dc7-8515-3f38c10c7607" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019e4604-2121-7dc7-8515-3f38c10c7607" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizedRegulatoryAssetsNoncurrent_019e4604-2121-7588-8eb0-363c606d524d" xlink:href="dte-20260630.xsd#dte_SecuritizedRegulatoryAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_dte_SecuritizedRegulatoryAssetsNoncurrent_019e4604-2121-7588-8eb0-363c606d524d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019e4604-2121-7c99-b1ba-5273fdb67671" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_019e4604-2121-7c99-b1ba-5273fdb67671" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssets_019e4604-2121-7dde-8e5c-c1267828e921" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_OtherAssets_019e4604-2121-7dde-8e5c-c1267828e921" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e4604-2121-7ff1-9b9e-e674658c1a58" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7636-826e-93beb1d90753" xlink:to="loc_us-gaap_Assets_019e4604-2121-7ff1-9b9e-e674658c1a58" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:to="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPayableCurrent_019e4604-2121-751c-8431-5fab3074a184" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:to="loc_us-gaap_InterestPayableCurrent_019e4604-2121-751c-8431-5fab3074a184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryLiabilityCurrent_019e4604-2121-7570-95a5-c6eefdf3d9bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:to="loc_us-gaap_RegulatoryLiabilityCurrent_019e4604-2121-7570-95a5-c6eefdf3d9bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBonds_019e4604-2121-71a6-929f-a6e507be8a7f" xlink:href="dte-20260630.xsd#dte_SecuritizationBonds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:to="loc_dte_SecuritizationBonds_019e4604-2121-71a6-929f-a6e507be8a7f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilities_019e4604-2121-7655-9510-15d67fcc5af7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:to="loc_us-gaap_OtherLiabilities_019e4604-2121-7655-9510-15d67fcc5af7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019e4604-2121-75f6-b3ad-3eee2aa7270a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7e09-bc1e-1bb88c834098" xlink:to="loc_us-gaap_Liabilities_019e4604-2121-75f6-b3ad-3eee2aa7270a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019e4604-2121-779e-8789-dabcc091a671" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLossCurrent_019e4604-2121-779e-8789-dabcc091a671" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBondsCurrent_019e4604-2121-7daf-9b5d-defb448df5d1" xlink:href="dte-20260630.xsd#dte_SecuritizationBondsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableInterestEntityLineItems_019e4604-2121-7dfe-9562-0bf6469e37fa" xlink:to="loc_dte_SecuritizationBondsCurrent_019e4604-2121-7daf-9b5d-defb448df5d1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesOtherIncomeDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesOtherIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesOtherIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:href="dte-20260630.xsd#dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentTable_019e4604-2121-76f0-a9a2-1aceda2d2180" xlink:href="dte-20260630.xsd#dte_ScheduleofOtherNonoperatingIncomebyComponentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentTable_019e4604-2121-76f0-a9a2-1aceda2d2180" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7024-ac95-086be37284d1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentTable_019e4604-2121-76f0-a9a2-1aceda2d2180" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7024-ac95-086be37284d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7024-ac95-086be37284d1_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7024-ac95-086be37284d1" xlink:to="loc_dei_EntityDomain_019e4604-2121-7024-ac95-086be37284d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-72d0-bc2c-d753dd413389" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7024-ac95-086be37284d1" xlink:to="loc_dei_EntityDomain_019e4604-2121-72d0-bc2c-d753dd413389" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-73dc-801a-c0c4b463d40b" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-72d0-bc2c-d753dd413389" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-73dc-801a-c0c4b463d40b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019e4604-2121-7157-9c56-59dec01f66c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity_019e4604-2121-7157-9c56-59dec01f66c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IncomeOnContractServices_019e4604-2121-775a-b235-06d20f1fff51" xlink:href="dte-20260630.xsd#dte_IncomeOnContractServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_dte_IncomeOnContractServices_019e4604-2121-775a-b235-06d20f1fff51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GainOnInvestments_019e4604-2121-7717-bfa8-8ff37fa0f214" xlink:href="dte-20260630.xsd#dte_GainOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_dte_GainOnInvestments_019e4604-2121-7717-bfa8-8ff37fa0f214" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e4604-2121-7252-814d-4a0b41ce88ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e4604-2121-7252-814d-4a0b41ce88ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_OtherMiscellaneousNonoperatingIncome_019e4604-2121-7943-8ab3-3a980247ce2f" xlink:href="dte-20260630.xsd#dte_OtherMiscellaneousNonoperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_dte_OtherMiscellaneousNonoperatingIncome_019e4604-2121-7943-8ab3-3a980247ce2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncome_019e4604-2121-7eed-bcbe-0248659537d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofOtherNonoperatingIncomebyComponentLineItems_019e4604-2121-763c-b542-db26e0319d4b" xlink:to="loc_us-gaap_OtherNonoperatingIncome_019e4604-2121-7eed-bcbe-0248659537d9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesEffectiveIncomeTaxRateReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dte_ScheduleofIncomeTaxesLineItems_019e4604-2121-765d-8b16-fd932994d1ca" xlink:href="dte-20260630.xsd#dte_ScheduleofIncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ScheduleofIncomeTaxesTable_019e4604-2121-7898-9bf7-b296ad0d65b8" xlink:href="dte-20260630.xsd#dte_ScheduleofIncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dte_ScheduleofIncomeTaxesLineItems_019e4604-2121-765d-8b16-fd932994d1ca" xlink:to="loc_dte_ScheduleofIncomeTaxesTable_019e4604-2121-7898-9bf7-b296ad0d65b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-749f-be8e-095b9d9ce791" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_ScheduleofIncomeTaxesTable_019e4604-2121-7898-9bf7-b296ad0d65b8" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-749f-be8e-095b9d9ce791" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-749f-be8e-095b9d9ce791_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-749f-be8e-095b9d9ce791" xlink:to="loc_dei_EntityDomain_019e4604-2121-749f-be8e-095b9d9ce791_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-76e5-9ac6-85e4417c2e17" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-749f-be8e-095b9d9ce791" xlink:to="loc_dei_EntityDomain_019e4604-2121-76e5-9ac6-85e4417c2e17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7f09-a10b-19387a927bfc" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-76e5-9ac6-85e4417c2e17" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7f09-a10b-19387a927bfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e4604-2121-7717-87e8-bfe74405e804" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofIncomeTaxesLineItems_019e4604-2121-765d-8b16-fd932994d1ca" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019e4604-2121-7717-87e8-bfe74405e804" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:href="dte-20260630.xsd#dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofIncomeTaxesLineItems_019e4604-2121-765d-8b16-fd932994d1ca" xlink:to="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019e4604-2121-7470-a150-961e03bcf9b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019e4604-2121-7470-a150-961e03bcf9b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_019e4604-2121-7c61-a9a3-b3f599d719c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsInvestment_019e4604-2121-7c61-a9a3-b3f599d719c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_019e4604-2121-779d-a8e7-448169a321c1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsOther_019e4604-2121-779d-a8e7-448169a321c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017AmortizationOfRegulatoryLiabilityPercent_019e4604-2121-7528-af75-395c129b22cd" xlink:href="dte-20260630.xsd#dte_EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017AmortizationOfRegulatoryLiabilityPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_dte_EffectiveIncomeTaxRateReconciliationTaxCutsAndJobsActOf2017AmortizationOfRegulatoryLiabilityPercent_019e4604-2121-7528-af75-395c129b22cd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EffectiveIncomeTaxRateReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquityPercent_019e4604-2121-7833-9d93-7dd04f0c0405" xlink:href="dte-20260630.xsd#dte_EffectiveIncomeTaxRateReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquityPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_dte_EffectiveIncomeTaxRateReconciliationAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquityPercent_019e4604-2121-7833-9d93-7dd04f0c0405" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EffectiveIncomeTaxRateReconciliationNondeductibleExpensePenaltyPercent_019e4604-2121-7a45-9724-92db60bc5130" xlink:href="dte-20260630.xsd#dte_EffectiveIncomeTaxRateReconciliationNondeductibleExpensePenaltyPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_dte_EffectiveIncomeTaxRateReconciliationNondeductibleExpensePenaltyPercent_019e4604-2121-7a45-9724-92db60bc5130" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EffectiveIncomeTaxRateReconciliationChangeInTaxLegislationPercent_019ed02b-fec1-7939-8248-84b0fdf592ee" xlink:href="dte-20260630.xsd#dte_EffectiveIncomeTaxRateReconciliationChangeInTaxLegislationPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_dte_EffectiveIncomeTaxRateReconciliationChangeInTaxLegislationPercent_019ed02b-fec1-7939-8248-84b0fdf592ee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent_019e4604-2121-73b5-b238-0f7e82a17acb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_EffectiveIncomeTaxRateReconciliationIncreaseDecreasePercentAbstract_019e4604-2121-7055-bbb7-bc785ce19212" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherReconcilingItemsPercent_019e4604-2121-73b5-b238-0f7e82a17acb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019e4604-2121-7dfc-81b3-8cc36b31629e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_ScheduleofIncomeTaxesLineItems_019e4604-2121-765d-8b16-fd932994d1ca" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019e4604-2121-7dfc-81b3-8cc36b31629e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:href="dte-20260630.xsd#dte_SignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:href="dte-20260630.xsd#dte_SignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7cab-8d78-71e436576d88" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7cab-8d78-71e436576d88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7cab-8d78-71e436576d88_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7cab-8d78-71e436576d88" xlink:to="loc_dei_EntityDomain_019e4604-2121-7cab-8d78-71e436576d88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7dc8-b869-e9851c05d1e0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7cab-8d78-71e436576d88" xlink:to="loc_dei_EntityDomain_019e4604-2121-7dc8-b869-e9851c05d1e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricandDTEGasMember_019e4604-2121-723a-800c-cf08aa0cccd6" xlink:href="dte-20260630.xsd#dte_DTEElectricandDTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7dc8-b869-e9851c05d1e0" xlink:to="loc_dte_DTEElectricandDTEGasMember_019e4604-2121-723a-800c-cf08aa0cccd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-775f-85ec-9e28efbea8f8" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_DTEElectricandDTEGasMember_019e4604-2121-723a-800c-cf08aa0cccd6" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-775f-85ec-9e28efbea8f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-700d-b0ea-95c47c571c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-700d-b0ea-95c47c571c8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-700d-b0ea-95c47c571c8b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-700d-b0ea-95c47c571c8b" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-700d-b0ea-95c47c571c8b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7635-9f2e-fa28458c3386" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-700d-b0ea-95c47c571c8b" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7635-9f2e-fa28458c3386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019e4604-2121-7cea-afc2-1fa71a607800" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7635-9f2e-fa28458c3386" xlink:to="loc_srt_AffiliatedEntityMember_019e4604-2121-7cea-afc2-1fa71a607800" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_019e4604-2121-7329-85f7-686aa03747b3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7635-9f2e-fa28458c3386" xlink:to="loc_srt_ParentCompanyMember_019e4604-2121-7329-85f7-686aa03747b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019e4604-2121-76fc-915e-d9365e2972a4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019e4604-2121-76fc-915e-d9365e2972a4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e4604-2121-76fc-915e-d9365e2972a4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e4604-2121-76fc-915e-d9365e2972a4" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e4604-2121-76fc-915e-d9365e2972a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019e4604-2121-727b-b386-b9743aae332b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019e4604-2121-76fc-915e-d9365e2972a4" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019e4604-2121-727b-b386-b9743aae332b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FederalIncomeTaxesMember_019e4604-2121-7815-a225-9bc9b5f25506" xlink:href="dte-20260630.xsd#dte_FederalIncomeTaxesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019e4604-2121-727b-b386-b9743aae332b" xlink:to="loc_dte_FederalIncomeTaxesMember_019e4604-2121-7815-a225-9bc9b5f25506" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7275-ae63-936a68ac9bbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7275-ae63-936a68ac9bbb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7275-ae63-936a68ac9bbb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7275-ae63-936a68ac9bbb" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7275-ae63-936a68ac9bbb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7ddd-8294-9de105c89ac8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7275-ae63-936a68ac9bbb" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7ddd-8294-9de105c89ac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_019e4604-2121-7547-bb69-6e75186c9020" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7ddd-8294-9de105c89ac8" xlink:to="loc_us-gaap_AccountsReceivableMember_019e4604-2121-7547-bb69-6e75186c9020" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableMember_019e4604-2121-7903-bd19-38f7438e8e10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7ddd-8294-9de105c89ac8" xlink:to="loc_us-gaap_NotesReceivableMember_019e4604-2121-7903-bd19-38f7438e8e10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e4604-2121-7b96-bdc2-eab9db1a39d4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_srt_RangeAxis_019e4604-2121-7b96-bdc2-eab9db1a39d4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-7b96-bdc2-eab9db1a39d4_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e4604-2121-7b96-bdc2-eab9db1a39d4" xlink:to="loc_srt_RangeMember_019e4604-2121-7b96-bdc2-eab9db1a39d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-7eab-b89c-1c3f09b18388" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e4604-2121-7b96-bdc2-eab9db1a39d4" xlink:to="loc_srt_RangeMember_019e4604-2121-7eab-b89c-1c3f09b18388" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e4604-2121-78e3-a746-21444a1a893a" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-7eab-b89c-1c3f09b18388" xlink:to="loc_srt_MinimumMember_019e4604-2121-78e3-a746-21444a1a893a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e4604-2121-7cce-93f5-628f83d055d8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-7eab-b89c-1c3f09b18388" xlink:to="loc_srt_MaximumMember_019e4604-2121-7cce-93f5-628f83d055d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019e4604-2121-7285-9af3-f7a7281803e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dte_SignificantAccountingPoliciesTable_019e4604-2121-71c0-bf50-89d77f8d3967" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019e4604-2121-7285-9af3-f7a7281803e5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019e4604-2121-7285-9af3-f7a7281803e5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019e4604-2121-7285-9af3-f7a7281803e5" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019e4604-2121-7285-9af3-f7a7281803e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019e4604-2121-7af9-a206-f1c0ea37b517" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_019e4604-2121-7285-9af3-f7a7281803e5" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019e4604-2121-7af9-a206-f1c0ea37b517" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialAssetPastDueMember_019e4604-2121-7ff4-80f3-19eeee3819aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialAssetPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_019e4604-2121-7af9-a206-f1c0ea37b517" xlink:to="loc_us-gaap_FinancialAssetPastDueMember_019e4604-2121-7ff4-80f3-19eeee3819aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_019eacc7-216a-7b03-a4e0-316e1cb8eb6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_019eacc7-216a-7b03-a4e0-316e1cb8eb6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019e4604-2121-76cd-9099-9d10b0cd0dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019e4604-2121-76cd-9099-9d10b0cd0dbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e4604-2121-776e-8f73-c850a6a6527c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019e4604-2121-776e-8f73-c850a6a6527c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e4604-2121-7ce5-8977-444de434864d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019e4604-2121-7ce5-8977-444de434864d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue_019e4604-2121-7fad-8cb5-428eab474a02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableThresholdPeriodPastDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_FinancingReceivableThresholdPeriodPastDue_019e4604-2121-7fad-8cb5-428eab474a02" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ThresholdPeriodPastDueForWriteoffOfTradeAccountsReceivable_019e4604-2121-7bef-9641-ead6740fa1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ThresholdPeriodPastDueForWriteoffOfTradeAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_ThresholdPeriodPastDueForWriteoffOfTradeAccountsReceivable_019e4604-2121-7bef-9641-ead6740fa1bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesThresholdDuration_019e4604-2121-7694-a68a-c6aa9fda8c20" xlink:href="dte-20260630.xsd#dte_SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesThresholdDuration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_dte_SpecificReviewOfProbableFutureCollectionsBasedOnReceivableBalancesThresholdDuration_019e4604-2121-7694-a68a-c6aa9fda8c20" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e4604-2121-76df-91e0-8c6464f45947" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_SignificantAccountingPoliciesLineItems_019e4604-2121-7bed-bf89-469138ca1c5f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e4604-2121-76df-91e0-8c6464f45947" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesFinancingReceivablesClassifiedbyInternalGradeofCreditRiskDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesFinancingReceivablesClassifiedbyInternalGradeofCreditRiskDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesFinancingReceivablesClassifiedbyInternalGradeofCreditRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019e4604-2121-748f-a5ad-2903037b23eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019e4604-2121-7499-9e3f-4c274c16a4ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019e4604-2121-748f-a5ad-2903037b23eb" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019e4604-2121-7499-9e3f-4c274c16a4ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7312-8072-c95f75b764be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019e4604-2121-7499-9e3f-4c274c16a4ee" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7312-8072-c95f75b764be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7312-8072-c95f75b764be_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7312-8072-c95f75b764be" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7312-8072-c95f75b764be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7cf5-81f4-a3a321a1414a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7312-8072-c95f75b764be" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7cf5-81f4-a3a321a1414a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableMember_019e4604-2121-76a4-bff1-f97ec7daa9e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7cf5-81f4-a3a321a1414a" xlink:to="loc_us-gaap_NotesReceivableMember_019e4604-2121-76a4-bff1-f97ec7daa9e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinanceLeaseReceivableMember_019e4604-2121-7045-8fe6-e81fd356dd80" xlink:href="dte-20260630.xsd#dte_FinanceLeaseReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7cf5-81f4-a3a321a1414a" xlink:to="loc_dte_FinanceLeaseReceivableMember_019e4604-2121-7045-8fe6-e81fd356dd80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentAxis_019e4604-2121-7cdf-8687-a61b8f97c7da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InternalCreditAssessmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019e4604-2121-7499-9e3f-4c274c16a4ee" xlink:to="loc_us-gaap_InternalCreditAssessmentAxis_019e4604-2121-7cdf-8687-a61b8f97c7da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cdf-8687-a61b8f97c7da_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019e4604-2121-7cdf-8687-a61b8f97c7da" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cdf-8687-a61b8f97c7da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cd8-a0c5-e118988dc83c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InternalCreditAssessmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InternalCreditAssessmentAxis_019e4604-2121-7cdf-8687-a61b8f97c7da" xlink:to="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cd8-a0c5-e118988dc83c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_InternalGradeOneMember_019e4604-2121-7b56-8d20-c4876942e840" xlink:href="dte-20260630.xsd#dte_InternalGradeOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cd8-a0c5-e118988dc83c" xlink:to="loc_dte_InternalGradeOneMember_019e4604-2121-7b56-8d20-c4876942e840" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_InternalGradeTwoMember_019e4604-2121-7e9a-9086-92ce8604f324" xlink:href="dte-20260630.xsd#dte_InternalGradeTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InternalCreditAssessmentDomain_019e4604-2121-7cd8-a0c5-e118988dc83c" xlink:to="loc_dte_InternalGradeTwoMember_019e4604-2121-7e9a-9086-92ce8604f324" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-70a3-a00e-0f7c71c71774" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_019e4604-2121-7499-9e3f-4c274c16a4ee" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-70a3-a00e-0f7c71c71774" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-70a3-a00e-0f7c71c71774_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-70a3-a00e-0f7c71c71774" xlink:to="loc_dei_EntityDomain_019e4604-2121-70a3-a00e-0f7c71c71774_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-73b6-98d2-ea2649a29483" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-70a3-a00e-0f7c71c71774" xlink:to="loc_dei_EntityDomain_019e4604-2121-73b6-98d2-ea2649a29483" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-76f5-bd7f-cc71750c2e9a" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-73b6-98d2-ea2649a29483" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-76f5-bd7f-cc71750c2e9a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_019e4604-2121-748f-a5ad-2903037b23eb" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019e4604-2121-7db3-accc-151f6b1c83d6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_019e4604-2121-7db3-accc-151f6b1c83d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019e4604-2121-78c5-9664-8e7c5c8b1d71" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_019e4604-2121-78c5-9664-8e7c5c8b1d71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancingReceivableExcludingAccruedInterestOriginatedTwoOrMoreYearsBeforeLatestFiscalYear_019e4604-2121-7e68-af30-6d94728cbe2a" xlink:href="dte-20260630.xsd#dte_FinancingReceivableExcludingAccruedInterestOriginatedTwoOrMoreYearsBeforeLatestFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:to="loc_dte_FinancingReceivableExcludingAccruedInterestOriginatedTwoOrMoreYearsBeforeLatestFiscalYear_019e4604-2121-7e68-af30-6d94728cbe2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e4604-2121-7122-881a-09ae08554f1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_019e4604-2121-77bf-b93a-3e22069d7004" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_019e4604-2121-7122-881a-09ae08554f1f" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesRollForwardofActivityforFinancingReceivablesCreditLossReservesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesRollForwardofActivityforFinancingReceivablesCreditLossReservesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesRollForwardofActivityforFinancingReceivablesCreditLossReservesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019e4604-2121-789e-b9b3-ddec0fb2eb00" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019e4604-2121-77ef-82b6-06256eb88d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019e4604-2121-789e-b9b3-ddec0fb2eb00" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019e4604-2121-77ef-82b6-06256eb88d9c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7594-b5f8-54a6907b6fef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019e4604-2121-77ef-82b6-06256eb88d9c" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7594-b5f8-54a6907b6fef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7594-b5f8-54a6907b6fef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7594-b5f8-54a6907b6fef" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-7594-b5f8-54a6907b6fef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-77e3-b4d4-dc5f378b8e69" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis_019e4604-2121-7594-b5f8-54a6907b6fef" xlink:to="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-77e3-b4d4-dc5f378b8e69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeAccountsReceivableMember_019e4604-2121-70ba-bd03-20527ce36b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TradeAccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-77e3-b4d4-dc5f378b8e69" xlink:to="loc_us-gaap_TradeAccountsReceivableMember_019e4604-2121-70ba-bd03-20527ce36b4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_OtherFinancingReceivablesMember_019e4604-2121-75a4-92b7-ab1384f65a18" xlink:href="dte-20260630.xsd#dte_OtherFinancingReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentClassOfFinancingReceivableDomain_019e4604-2121-77e3-b4d4-dc5f378b8e69" xlink:to="loc_dte_OtherFinancingReceivablesMember_019e4604-2121-75a4-92b7-ab1384f65a18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7bea-be07-c055c7360825" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_019e4604-2121-77ef-82b6-06256eb88d9c" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7bea-be07-c055c7360825" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7bea-be07-c055c7360825_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7bea-be07-c055c7360825" xlink:to="loc_dei_EntityDomain_019e4604-2121-7bea-be07-c055c7360825_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-79db-ae57-e63db0b42bb0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7bea-be07-c055c7360825" xlink:to="loc_dei_EntityDomain_019e4604-2121-79db-ae57-e63db0b42bb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7c5d-855f-332f840681ad" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-79db-ae57-e63db0b42bb0" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7c5d-855f-332f840681ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_019e4604-2121-789e-b9b3-ddec0fb2eb00" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019e4604-2121-7bcb-896b-4de358457178" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019e4604-2121-7bcb-896b-4de358457178" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019e4604-2121-7b5a-986b-00edd8e01713" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestCreditLossExpenseReversal_019e4604-2121-7b5a-986b-00edd8e01713" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019e4604-2121-71bf-90dc-e6ee6ff21840" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_019e4604-2121-71bf-90dc-e6ee6ff21840" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019e4604-2121-7940-bcf0-3d45924737dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRollForward_019e4604-2121-7cea-aa76-47339b05df3c" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossRecovery_019e4604-2121-7940-bcf0-3d45924737dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_019e4604-2121-71f3-8bb4-0ed5e078ada5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SignificantAccountingPoliciesUncollectibleExpenseDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SignificantAccountingPoliciesUncollectibleExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SignificantAccountingPoliciesUncollectibleExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019e4604-2121-77da-bb6c-b605dbca6ac1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019e4604-2121-7f93-9dc8-bc2c04635ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019e4604-2121-77da-bb6c-b605dbca6ac1" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019e4604-2121-7f93-9dc8-bc2c04635ba8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-731b-b9bb-90848862b63d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_019e4604-2121-7f93-9dc8-bc2c04635ba8" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-731b-b9bb-90848862b63d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-731b-b9bb-90848862b63d_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-731b-b9bb-90848862b63d" xlink:to="loc_dei_EntityDomain_019e4604-2121-731b-b9bb-90848862b63d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7977-b9e2-0cf324ebebd4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-731b-b9bb-90848862b63d" xlink:to="loc_dei_EntityDomain_019e4604-2121-7977-b9e2-0cf324ebebd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7b94-87f5-e123684d4be6" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7977-b9e2-0cf324ebebd4" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7b94-87f5-e123684d4be6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancingReceivableCreditLossExpenseReversalAdjustedForRegulatoryDeferrals_019e4604-2121-70dc-8276-d4a3edcf6f4c" xlink:href="dte-20260630.xsd#dte_FinancingReceivableCreditLossExpenseReversalAdjustedForRegulatoryDeferrals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_019e4604-2121-77da-bb6c-b605dbca6ac1" xlink:to="loc_dte_FinancingReceivableCreditLossExpenseReversalAdjustedForRegulatoryDeferrals_019e4604-2121-70dc-8276-d4a3edcf6f4c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueDisaggregationofRevenueBySegmentDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueDisaggregationofRevenueBySegmentDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueDisaggregationofRevenueBySegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-76b6-b417-a6fc85985d78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-76b6-b417-a6fc85985d78" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e4604-2121-7d6b-b005-c2ad5815c205" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:to="loc_srt_ConsolidationItemsAxis_019e4604-2121-7d6b-b005-c2ad5815c205" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-2121-7d6b-b005-c2ad5815c205_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-2121-7d6b-b005-c2ad5815c205" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-2121-7d6b-b005-c2ad5815c205_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-2121-7a84-96cd-dd6a9e114750" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-2121-7d6b-b005-c2ad5815c205" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-2121-7a84-96cd-dd6a9e114750" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e4604-2121-7684-b26c-ecccc419573e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-2121-7a84-96cd-dd6a9e114750" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e4604-2121-7684-b26c-ecccc419573e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-76c1-b586-a0f393f0d657" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-76c1-b586-a0f393f0d657" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-2121-76c1-b586-a0f393f0d657_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-76c1-b586-a0f393f0d657" xlink:to="loc_us-gaap_SegmentDomain_019e4604-2121-76c1-b586-a0f393f0d657_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-76c1-b586-a0f393f0d657" xlink:to="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricSegmentMember_019e4604-2121-77ce-b0c5-5208f3dcc6ec" xlink:href="dte-20260630.xsd#dte_ElectricSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:to="loc_dte_ElectricSegmentMember_019e4604-2121-77ce-b0c5-5208f3dcc6ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GasSegmentMember_019e4604-2121-7ef8-862f-cf70dc21db4e" xlink:href="dte-20260630.xsd#dte_GasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:to="loc_dte_GasSegmentMember_019e4604-2121-7ef8-862f-cf70dc21db4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEVantageSegmentMember_019e4604-2121-7640-91dd-c0f52ab9ff56" xlink:href="dte-20260630.xsd#dte_DTEVantageSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:to="loc_dte_DTEVantageSegmentMember_019e4604-2121-7640-91dd-c0f52ab9ff56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnergyTradingSegmentMember_019e4604-2121-76e9-b0d6-047e3d84b66b" xlink:href="dte-20260630.xsd#dte_EnergyTradingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-717c-8da9-842d0f1d19f2" xlink:to="loc_dte_EnergyTradingSegmentMember_019e4604-2121-76e9-b0d6-047e3d84b66b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e4604-2121-72fe-83dc-943e434f37e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e4604-2121-72fe-83dc-943e434f37e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-72fe-83dc-943e434f37e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e4604-2121-72fe-83dc-943e434f37e9" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-72fe-83dc-943e434f37e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerSalesChannelDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_019e4604-2121-72fe-83dc-943e434f37e9" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ResidentialMember_019e4604-2121-737f-bd2d-fcd9d269f28d" xlink:href="dte-20260630.xsd#dte_ResidentialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_ResidentialMember_019e4604-2121-737f-bd2d-fcd9d269f28d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_CommercialMember_019e4604-2121-7b4e-bf32-e97b9867e121" xlink:href="dte-20260630.xsd#dte_CommercialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_CommercialMember_019e4604-2121-7b4e-bf32-e97b9867e121" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IndustrialMember_019e4604-2121-72f6-8386-01d4df570834" xlink:href="dte-20260630.xsd#dte_IndustrialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_IndustrialMember_019e4604-2121-72f6-8386-01d4df570834" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GasSalesMember_019e4604-2121-7f89-bd00-2305ed03e5e3" xlink:href="dte-20260630.xsd#dte_GasSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_GasSalesMember_019e4604-2121-7f89-bd00-2305ed03e5e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EndUserTransportationMember_019e4604-2121-75a4-bf41-d78319c52fa7" xlink:href="dte-20260630.xsd#dte_EndUserTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_EndUserTransportationMember_019e4604-2121-75a4-bf41-d78319c52fa7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_IntermediateTransportationMember_019e4604-2121-7b7b-8017-68e044ff2769" xlink:href="dte-20260630.xsd#dte_IntermediateTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_IntermediateTransportationMember_019e4604-2121-7b7b-8017-68e044ff2769" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_OtherMember_019e4604-2121-7d4e-b5e2-08bd788a5348" xlink:href="dte-20260630.xsd#dte_OtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_019e4604-2121-7ac8-80bb-3c19ab669690" xlink:to="loc_dte_OtherMember_019e4604-2121-7d4e-b5e2-08bd788a5348" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7dbe-afab-30688cde191c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-7be6-94e9-219223ecbe9e" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7dbe-afab-30688cde191c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7dbe-afab-30688cde191c_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7dbe-afab-30688cde191c" xlink:to="loc_dei_EntityDomain_019e4604-2121-7dbe-afab-30688cde191c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7ed4-a441-0bf9d9d79ce5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7dbe-afab-30688cde191c" xlink:to="loc_dei_EntityDomain_019e4604-2121-7ed4-a441-0bf9d9d79ce5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTESustainableGenerationMember_019e4604-2121-725f-a233-067a3f129180" xlink:href="dte-20260630.xsd#dte_DTESustainableGenerationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7ed4-a441-0bf9d9d79ce5" xlink:to="loc_dte_DTESustainableGenerationMember_019e4604-2121-725f-a233-067a3f129180" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_019e4604-2121-772a-b245-7d25adf57dbb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-76b6-b417-a6fc85985d78" xlink:to="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_019e4604-2121-772a-b245-7d25adf57dbb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueRevenuesOutsidetheScopeofTopic606Details" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueRevenuesOutsidetheScopeofTopic606Details"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueRevenuesOutsidetheScopeofTopic606Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-75de-afc5-13017a9f815b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-75de-afc5-13017a9f815b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e4604-2121-70a8-a8cd-8aa87f0da423" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-75de-afc5-13017a9f815b" xlink:to="loc_srt_ConsolidationItemsAxis_019e4604-2121-70a8-a8cd-8aa87f0da423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-2121-70a8-a8cd-8aa87f0da423_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-2121-70a8-a8cd-8aa87f0da423" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-2121-70a8-a8cd-8aa87f0da423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-2121-72c3-80e1-df1faa25a856" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-2121-70a8-a8cd-8aa87f0da423" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-2121-72c3-80e1-df1faa25a856" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e4604-2121-71ca-b04f-c0e9600d949a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-2121-72c3-80e1-df1faa25a856" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e4604-2121-71ca-b04f-c0e9600d949a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-78ab-8be1-049471cd6d1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e4604-2121-75de-afc5-13017a9f815b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-78ab-8be1-049471cd6d1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-2121-78ab-8be1-049471cd6d1b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-78ab-8be1-049471cd6d1b" xlink:to="loc_us-gaap_SegmentDomain_019e4604-2121-78ab-8be1-049471cd6d1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-2121-78ab-8be1-049471cd6d1b" xlink:to="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricSegmentMember_019e4604-2121-757f-bd4b-94242167c4ea" xlink:href="dte-20260630.xsd#dte_ElectricSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:to="loc_dte_ElectricSegmentMember_019e4604-2121-757f-bd4b-94242167c4ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GasSegmentMember_019e4604-2121-7285-9e1b-0150e03bb616" xlink:href="dte-20260630.xsd#dte_GasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:to="loc_dte_GasSegmentMember_019e4604-2121-7285-9e1b-0150e03bb616" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEVantageSegmentMember_019e4604-2121-7f1a-aba1-538f1c940ff4" xlink:href="dte-20260630.xsd#dte_DTEVantageSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:to="loc_dte_DTEVantageSegmentMember_019e4604-2121-7f1a-aba1-538f1c940ff4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnergyTradingSegmentMember_019e4604-2121-774f-9265-ec55776b864b" xlink:href="dte-20260630.xsd#dte_EnergyTradingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-2121-75b0-a7ea-1ab559f4500a" xlink:to="loc_dte_EnergyTradingSegmentMember_019e4604-2121-774f-9265-ec55776b864b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomer_019e4604-2121-72b8-845b-70e99582d404" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomer_019e4604-2121-72b8-845b-70e99582d404" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueNotFromContractWithCustomerOther_019e4604-2121-7fc7-ab03-5a96512761be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueNotFromContractWithCustomerOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:to="loc_us-gaap_RevenueNotFromContractWithCustomerOther_019e4604-2121-7fc7-ab03-5a96512761be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_019e4604-2121-71dc-b8eb-ccdb87af9982" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncome_019e4604-2121-71dc-b8eb-ccdb87af9982" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e4604-2121-726b-92d9-906c32866502" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e4604-2121-7a6c-9241-58b26f480da0" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e4604-2121-726b-92d9-906c32866502" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueExpectedRecognitionofDeferredRevenueDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueExpectedRecognitionofDeferredRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueExpectedRecognitionofDeferredRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e4604-2121-772c-8dc1-6feabbe74a90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e4604-2121-772c-8dc1-6feabbe74a90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7bcf-a805-cd717405907d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7bcf-a805-cd717405907d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ContractWithCustomerLiabilityMember_019e4604-2121-7d5c-8290-f99086d68c95" xlink:href="dte-20260630.xsd#dte_ContractWithCustomerLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:to="loc_dte_ContractWithCustomerLiabilityMember_019e4604-2121-7d5c-8290-f99086d68c95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-753b-8e4a-0fec108fddd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-753b-8e4a-0fec108fddd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-7f57-bd52-a570fbd6a975" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-7f57-bd52-a570fbd6a975" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueExpectedRecognitionofDeferredRevenueDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueExpectedRecognitionofDeferredRevenueDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueExpectedRecognitionofDeferredRevenueDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7aad-9ade-9340ee5ab43c" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7bcf-a805-cd717405907d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7bcf-a805-cd717405907d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_019e4604-2121-7bcf-a805-cd717405907d" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ContractWithCustomerLiabilityMember_019e4604-2121-7d5c-8290-f99086d68c95" xlink:href="dte-20260630.xsd#dte_ContractWithCustomerLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_019e4604-2121-7ed8-862a-0604583d055d" xlink:to="loc_dte_ContractWithCustomerLiabilityMember_019e4604-2121-7d5c-8290-f99086d68c95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-753b-8e4a-0fec108fddd8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-753b-8e4a-0fec108fddd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-7f57-bd52-a570fbd6a975" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7488-b6a7-952d7bbd5baa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-7f57-bd52-a570fbd6a975" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueExpectedTimingofPerformanceObligationSatisfactionDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueExpectedTimingofPerformanceObligationSatisfactionDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueExpectedTimingofPerformanceObligationSatisfactionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-7bb1-ab6d-978cbdedeecc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-7bb1-ab6d-978cbdedeecc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedPriceContractMember_019e4604-2121-7b6f-8ecb-dbd8f95d4438" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedPriceContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:to="loc_us-gaap_FixedPriceContractMember_019e4604-2121-7b6f-8ecb-dbd8f95d4438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e4604-2121-79db-9111-40e88396e4cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019e4604-2121-79db-9111-40e88396e4cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7787-8ec8-3472aed4c0a9_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:to="loc_dei_EntityDomain_019e4604-2121-7787-8ec8-3472aed4c0a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:to="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7712-9c43-f41d941e381f" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7712-9c43-f41d941e381f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-7c04-b3b7-b8c0052c9c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-7c04-b3b7-b8c0052c9c6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-79c9-8022-6496118355b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-79c9-8022-6496118355b9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RevenueExpectedTimingofPerformanceObligationSatisfactionDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#RevenueExpectedTimingofPerformanceObligationSatisfactionDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RevenueExpectedTimingofPerformanceObligationSatisfactionDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-7bb1-ab6d-978cbdedeecc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-7bb1-ab6d-978cbdedeecc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerBasisOfPricingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingAxis_019e4604-2121-7bb1-ab6d-978cbdedeecc" xlink:to="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedPriceContractMember_019e4604-2121-7b6f-8ecb-dbd8f95d4438" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedPriceContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ContractWithCustomerBasisOfPricingDomain_019e4604-2121-781a-960b-3dd05fb2f170" xlink:to="loc_us-gaap_FixedPriceContractMember_019e4604-2121-7b6f-8ecb-dbd8f95d4438" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019e4604-2121-7523-a634-eeb3ac51df10" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7787-8ec8-3472aed4c0a9_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:to="loc_dei_EntityDomain_019e4604-2121-7787-8ec8-3472aed4c0a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7787-8ec8-3472aed4c0a9" xlink:to="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7712-9c43-f41d941e381f" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7901-8355-0330b24a232e" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7712-9c43-f41d941e381f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-7c04-b3b7-b8c0052c9c6f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019e4604-2121-7c04-b3b7-b8c0052c9c6f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-79c9-8022-6496118355b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019e4604-2121-7d16-8fef-2dacbcd781d5" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019e4604-2121-79c9-8022-6496118355b9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RegulatoryMattersDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#RegulatoryMattersDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RegulatoryMattersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019e4604-2121-78a9-b805-e81aac27dcde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesGeneralDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019e4604-2121-78a9-b805-e81aac27dcde" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_019e4604-2121-784c-ac6a-0cbcb96abb5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019e4604-2121-78a9-b805-e81aac27dcde" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_019e4604-2121-784c-ac6a-0cbcb96abb5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-784c-ac6a-0cbcb96abb5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_019e4604-2121-784c-ac6a-0cbcb96abb5b" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-784c-ac6a-0cbcb96abb5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRegulatoryProceedingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingAxis_019e4604-2121-784c-ac6a-0cbcb96abb5b" xlink:to="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A2025DTEElectricRateCaseFilingMember_019e4604-2121-77a7-af1f-5a3a9a8cfa66" xlink:href="dte-20260630.xsd#dte_A2025DTEElectricRateCaseFilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:to="loc_dte_A2025DTEElectricRateCaseFilingMember_019e4604-2121-77a7-af1f-5a3a9a8cfa66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A2025ElectricDepreciationCaseFilingMember_019e4604-2121-78e0-9ec4-362716002b8c" xlink:href="dte-20260630.xsd#dte_A2025ElectricDepreciationCaseFilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:to="loc_dte_A2025ElectricDepreciationCaseFilingMember_019e4604-2121-78e0-9ec4-362716002b8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A2025GasRateCaseFilingMember_019e4604-2121-7ad6-a3aa-1c59b2635c0d" xlink:href="dte-20260630.xsd#dte_A2025GasRateCaseFilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:to="loc_dte_A2025GasRateCaseFilingMember_019e4604-2121-7ad6-a3aa-1c59b2635c0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A2026DTEElectricRateCaseFilingMember_019e4604-2121-74bb-830b-b160a32e4c59" xlink:href="dte-20260630.xsd#dte_A2026DTEElectricRateCaseFilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:to="loc_dte_A2026DTEElectricRateCaseFilingMember_019e4604-2121-74bb-830b-b160a32e4c59" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A2026SecuritizationFilingMember_019ed042-6067-7729-a528-901c8b849e3f" xlink:href="dte-20260630.xsd#dte_A2026SecuritizationFilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesRegulatoryProceedingDomain_019e4604-2121-7a06-81e9-6bc3a83df7d3" xlink:to="loc_dte_A2026SecuritizationFilingMember_019ed042-6067-7729-a528-901c8b849e3f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyAxis_019e4604-2121-757f-ac3b-48ddb878cb1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019e4604-2121-78a9-b805-e81aac27dcde" xlink:to="loc_us-gaap_RegulatoryAgencyAxis_019e4604-2121-757f-ac3b-48ddb878cb1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_019e4604-2121-757f-ac3b-48ddb878cb1f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_019e4604-2121-757f-ac3b-48ddb878cb1f" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_019e4604-2121-757f-ac3b-48ddb878cb1f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatoryAgencyDomain_019e4604-2121-7608-b828-1a5e01b3cacd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatoryAgencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RegulatoryAgencyAxis_019e4604-2121-757f-ac3b-48ddb878cb1f" xlink:to="loc_us-gaap_RegulatoryAgencyDomain_019e4604-2121-7608-b828-1a5e01b3cacd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_MPSCMember_019e4604-2121-70aa-93c2-d43504de57e0" xlink:href="dte-20260630.xsd#dte_MPSCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RegulatoryAgencyDomain_019e4604-2121-7608-b828-1a5e01b3cacd" xlink:to="loc_dte_MPSCMember_019e4604-2121-70aa-93c2-d43504de57e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7733-accf-50aeaf07e8ad" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresTable_019e4604-2121-78a9-b805-e81aac27dcde" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7733-accf-50aeaf07e8ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7733-accf-50aeaf07e8ad_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7733-accf-50aeaf07e8ad" xlink:to="loc_dei_EntityDomain_019e4604-2121-7733-accf-50aeaf07e8ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7cd4-9fa7-3ef61a2bd395" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7733-accf-50aeaf07e8ad" xlink:to="loc_dei_EntityDomain_019e4604-2121-7cd4-9fa7-3ef61a2bd395" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-703c-83ef-ae5c95c93518" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7cd4-9fa7-3ef61a2bd395" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-703c-83ef-ae5c95c93518" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019e4604-2121-7401-a36d-ddac0aa6c9a4" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7cd4-9fa7-3ef61a2bd395" xlink:to="loc_dte_DTEGasMember_019e4604-2121-7401-a36d-ddac0aa6c9a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_019e4604-2121-7531-96d2-af8585ce2a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount_019e4604-2121-7531-96d2-af8585ce2a8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_019e4604-2121-7d04-a846-e610e76413d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage_019e4604-2121-7d04-a846-e610e76413d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_019e4604-2121-7f2a-8139-0e2ba1100606" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage_019e4604-2121-7f2a-8139-0e2ba1100606" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount_019e4604-2121-7473-97a8-460fb4ce3620" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_us-gaap_PublicUtilitiesApprovedRateIncreaseDecreaseAmount_019e4604-2121-7473-97a8-460fb4ce3620" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PublicUtilitiesIncreaseDecreaseInTotalRevenueDeficiencyAmount_019e4604-2121-7d99-a99a-424eaba87ca5" xlink:href="dte-20260630.xsd#dte_PublicUtilitiesIncreaseDecreaseInTotalRevenueDeficiencyAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_dte_PublicUtilitiesIncreaseDecreaseInTotalRevenueDeficiencyAmount_019e4604-2121-7d99-a99a-424eaba87ca5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PublicUtilitiesInfrastructureRecoveryMechanismIRMRollInAmount_019e4604-2121-7764-8582-b5811f2d10a5" xlink:href="dte-20260630.xsd#dte_PublicUtilitiesInfrastructureRecoveryMechanismIRMRollInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesGeneralDisclosuresLineItems_019e4604-2121-7049-bc3d-f971543b8d84" xlink:to="loc_dte_PublicUtilitiesInfrastructureRecoveryMechanismIRMRollInAmount_019e4604-2121-7764-8582-b5811f2d10a5" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-70ee-8d01-eeb8db25d4b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-70ee-8d01-eeb8db25d4b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-76cc-814f-0c6bf36face5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-76cc-814f-0c6bf36face5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7007-b512-bb03ab5686a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7007-b512-bb03ab5686a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7aa3-bd47-608f29697d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7aa3-bd47-608f29697d5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e4604-2121-70b1-8328-4b3800858799" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e4604-2121-70b1-8328-4b3800858799" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7283-9caf-7665a7774955_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7283-9caf-7665a7774955_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-7002-a78c-5f85ac245932" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:to="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-7002-a78c-5f85ac245932" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7fc6-bea1-70b6d84207d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7fc6-bea1-70b6d84207d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-73f0-a1c1-527635f007f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-73f0-a1c1-527635f007f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7b1d-9820-c68b6992b596" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7b1d-9820-c68b6992b596" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgeFundsMember_019e4604-2121-74ea-a80f-b7270987a9d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:to="loc_us-gaap_HedgeFundsMember_019e4604-2121-74ea-a80f-b7270987a9d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c06-8872-e792632cb798_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c06-8872-e792632cb798_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7b13-95ca-ecae831bd4ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:to="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7b13-95ca-ecae831bd4ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7c81-b369-74851e1cca56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7c81-b369-74851e1cca56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7f49-a711-bc76ce76fc15" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7f49-a711-bc76ce76fc15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7554-9015-fed2ee6b1c21" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7554-9015-fed2ee6b1c21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7ca1-bbcf-0eeb9760729f" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7ca1-bbcf-0eeb9760729f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherContractMember_019e4604-2121-713e-91b0-76975555785b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_us-gaap_OtherContractMember_019e4604-2121-713e-91b0-76975555785b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-78a5-9ef6-fcf9694924f5" xlink:href="dte-20260630.xsd#dte_FinancialTransmissionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-78a5-9ef6-fcf9694924f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7945-abf1-544a00aa41a6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7945-abf1-544a00aa41a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7a88-ac16-79ad34c60c2b_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:to="loc_dei_EntityDomain_019e4604-2121-7a88-ac16-79ad34c60c2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:to="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-72ba-b1f6-7416e402fd88" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-72ba-b1f6-7416e402fd88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e4604-2121-7803-ad6d-8855111fe6ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e4604-2121-7803-ad6d-8855111fe6ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7d46-8fd8-04910f99197f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DecommissioningTrustAssetsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7d46-8fd8-04910f99197f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019e4604-2121-7659-a50a-214fb8d938fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019e4604-2121-7659-a50a-214fb8d938fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7038-a5a9-d15cbd778b93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7038-a5a9-d15cbd778b93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f36-9374-cede0b2241f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f36-9374-cede0b2241f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e4604-2121-7f80-b488-c1e65551095b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeAssets_019e4604-2121-7f80-b488-c1e65551095b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e4604-2121-7726-8938-dec450c76c9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e4604-2121-7726-8938-dec450c76c9b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-74b9-8c51-b74094143478" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-74b9-8c51-b74094143478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-7a65-9ed6-8a7a41a5843b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-7a65-9ed6-8a7a41a5843b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e4604-2121-73e0-879f-a3f7d0049a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeLiabilities_019e4604-2121-73e0-879f-a3f7d0049a9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e4604-2121-7584-8797-62802fbcddfb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019e4604-2121-7584-8797-62802fbcddfb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_019e4604-2121-7760-84dd-74a31cb01f1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_FairValueNetAssetLiability_019e4604-2121-7760-84dd-74a31cb01f1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset_019e4604-2121-78d3-bdd5-d22a6a6966dc" xlink:href="dte-20260630.xsd#dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset_019e4604-2121-78d3-bdd5-d22a6a6966dc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueAssetsandLiabilitiesMeasuredandRecordedatFairValueonaRecurringBasisDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-70ee-8d01-eeb8db25d4b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-70ee-8d01-eeb8db25d4b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-70ee-8d01-eeb8db25d4b8" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-76cc-814f-0c6bf36face5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-76cc-814f-0c6bf36face5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7007-b512-bb03ab5686a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7007-b512-bb03ab5686a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7aa3-bd47-608f29697d5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7aa3-bd47-608f29697d5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e4604-2121-70b1-8328-4b3800858799" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7b8e-a964-3e1291a009c4" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_019e4604-2121-70b1-8328-4b3800858799" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7283-9caf-7665a7774955_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7283-9caf-7665a7774955_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7283-9caf-7665a7774955" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-7002-a78c-5f85ac245932" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:to="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-7002-a78c-5f85ac245932" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7fc6-bea1-70b6d84207d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7154-9182-516bcd3c4f53" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7fc6-bea1-70b6d84207d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-73f0-a1c1-527635f007f4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-73f0-a1c1-527635f007f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-73f0-a1c1-527635f007f4" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7b1d-9820-c68b6992b596" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7b1d-9820-c68b6992b596" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgeFundsMember_019e4604-2121-74ea-a80f-b7270987a9d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7875-afb0-03e4f3453c4e" xlink:to="loc_us-gaap_HedgeFundsMember_019e4604-2121-74ea-a80f-b7270987a9d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c06-8872-e792632cb798_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c06-8872-e792632cb798_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7c06-8872-e792632cb798" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7b13-95ca-ecae831bd4ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d29-8b9f-a2dfca024a0f" xlink:to="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7b13-95ca-ecae831bd4ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7c81-b369-74851e1cca56_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7c81-b369-74851e1cca56_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7c81-b369-74851e1cca56" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7f49-a711-bc76ce76fc15" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7f49-a711-bc76ce76fc15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7554-9015-fed2ee6b1c21" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7554-9015-fed2ee6b1c21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7ca1-bbcf-0eeb9760729f" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7ca1-bbcf-0eeb9760729f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherContractMember_019e4604-2121-713e-91b0-76975555785b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_us-gaap_OtherContractMember_019e4604-2121-713e-91b0-76975555785b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-78a5-9ef6-fcf9694924f5" xlink:href="dte-20260630.xsd#dte_FinancialTransmissionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-73be-9efc-88f04b107774" xlink:to="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-78a5-9ef6-fcf9694924f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-790e-8762-b3e927ed0ddd" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7a88-ac16-79ad34c60c2b_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:to="loc_dei_EntityDomain_019e4604-2121-7a88-ac16-79ad34c60c2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7a88-ac16-79ad34c60c2b" xlink:to="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-72ba-b1f6-7416e402fd88" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-76e3-921e-39137389183b" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-72ba-b1f6-7416e402fd88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e4604-2121-7803-ad6d-8855111fe6ee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_019e4604-2121-7803-ad6d-8855111fe6ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7d46-8fd8-04910f99197f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DecommissioningTrustAssetsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7d46-8fd8-04910f99197f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_019e4604-2121-7659-a50a-214fb8d938fb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_019e4604-2121-7659-a50a-214fb8d938fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7038-a5a9-d15cbd778b93" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7038-a5a9-d15cbd778b93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f36-9374-cede0b2241f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f36-9374-cede0b2241f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019e4604-2121-7f80-b488-c1e65551095b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-7be5-9c4a-7e03670cdc1f" xlink:to="loc_us-gaap_DerivativeAssets_019e4604-2121-7f80-b488-c1e65551095b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019e4604-2121-7726-8938-dec450c76c9b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_019e4604-2121-7e6f-8b81-a29e707c27ed" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019e4604-2121-7726-8938-dec450c76c9b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-74b9-8c51-b74094143478" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-74b9-8c51-b74094143478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-7a65-9ed6-8a7a41a5843b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-7a65-9ed6-8a7a41a5843b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019e4604-2121-73e0-879f-a3f7d0049a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-71b0-be3e-95e1456dc5a1" xlink:to="loc_us-gaap_DerivativeLiabilities_019e4604-2121-73e0-879f-a3f7d0049a9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019e4604-2121-7584-8797-62802fbcddfb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_019e4604-2121-7354-8796-6feb594c33e8" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019e4604-2121-7584-8797-62802fbcddfb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetAssetLiability_019e4604-2121-7760-84dd-74a31cb01f1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetAssetLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_us-gaap_FairValueNetAssetLiability_019e4604-2121-7760-84dd-74a31cb01f1e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset_019e4604-2121-78d3-bdd5-d22a6a6966dc" xlink:href="dte-20260630.xsd#dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-73f5-8185-35dcbaf40bf4" xlink:to="loc_dte_DerivativeAssetLiabilityFairValueGrossLiabilityAssetAndObligationToReturnCashAndRightToReclaimCashOffset_019e4604-2121-78d3-bdd5-d22a6a6966dc" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-718d-81ba-cd4831039863" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-718d-81ba-cd4831039863" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-718d-81ba-cd4831039863_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-718d-81ba-cd4831039863" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-718d-81ba-cd4831039863_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7732-86c2-90ab9b6b1ef6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-718d-81ba-cd4831039863" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7732-86c2-90ab9b6b1ef6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EquityOrDebtSecuritiesMember_019e4604-2121-7e8f-8e23-cc977e50eb1a" xlink:href="dte-20260630.xsd#dte_EquityOrDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7732-86c2-90ab9b6b1ef6" xlink:to="loc_dte_EquityOrDebtSecuritiesMember_019e4604-2121-7e8f-8e23-cc977e50eb1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7763-922a-aaa5b7a06e90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7732-86c2-90ab9b6b1ef6" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7763-922a-aaa5b7a06e90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e4604-2121-7c4e-866e-bf0f400fbf75" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:to="loc_srt_RangeAxis_019e4604-2121-7c4e-866e-bf0f400fbf75" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-7c4e-866e-bf0f400fbf75_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e4604-2121-7c4e-866e-bf0f400fbf75" xlink:to="loc_srt_RangeMember_019e4604-2121-7c4e-866e-bf0f400fbf75_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-7b6b-b775-de77a05b1ae0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e4604-2121-7c4e-866e-bf0f400fbf75" xlink:to="loc_srt_RangeMember_019e4604-2121-7b6b-b775-de77a05b1ae0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e4604-2121-7123-85d3-df6eb0cdc70f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-7b6b-b775-de77a05b1ae0" xlink:to="loc_srt_MinimumMember_019e4604-2121-7123-85d3-df6eb0cdc70f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e4604-2121-7a48-b77d-d117dc98e962" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-7b6b-b775-de77a05b1ae0" xlink:to="loc_srt_MaximumMember_019e4604-2121-7a48-b77d-d117dc98e962" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7e0d-b0bc-4a8f9c4322c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7e0d-b0bc-4a8f9c4322c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7e0d-b0bc-4a8f9c4322c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7e0d-b0bc-4a8f9c4322c8" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7e0d-b0bc-4a8f9c4322c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7420-a5d5-f94bb3fb5e8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7e0d-b0bc-4a8f9c4322c8" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7420-a5d5-f94bb3fb5e8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-7bcb-8ddf-4a4cec05bca6" xlink:href="dte-20260630.xsd#dte_NuclearDecommissioningTrustFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7420-a5d5-f94bb3fb5e8d" xlink:to="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-7bcb-8ddf-4a4cec05bca6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-790b-9b25-64a73ad6f3e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019e4604-2121-730d-ae0b-2bf281d05d5a" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-790b-9b25-64a73ad6f3e9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-790b-9b25-64a73ad6f3e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-790b-9b25-64a73ad6f3e9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-790b-9b25-64a73ad6f3e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7a15-81a1-035bf8a937d4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-790b-9b25-64a73ad6f3e9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7a15-81a1-035bf8a937d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7c87-b0d1-40546a927f29" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7a15-81a1-035bf8a937d4" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7c87-b0d1-40546a927f29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriod1_019e4604-2121-73d0-b43d-48a6c638c2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareInvestmentRedemptionNoticePeriod1_019e4604-2121-73d0-b43d-48a6c638c2ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareContractualTerm_019e4604-2121-7956-af24-58f7d2028806" xlink:href="dte-20260630.xsd#dte_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:to="loc_dte_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareContractualTerm_019e4604-2121-7956-af24-58f7d2028806" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_019e4604-2121-7530-89e9-d1c16f971555" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_019e4604-2121-7530-89e9-d1c16f971555" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_019e4604-2121-79c6-91bc-42d04bfe756a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019e4604-2121-7e75-9b58-003f448a51f3" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_019e4604-2121-79c6-91bc-42d04bfe756a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueReconciliationofLevel3AssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueReconciliationofLevel3AssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueReconciliationofLevel3AssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019e4604-2121-790f-a2c9-3c774cc4df5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019e4604-2121-7a60-af94-ef7328ed2fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019e4604-2121-790f-a2c9-3c774cc4df5f" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019e4604-2121-7a60-af94-ef7328ed2fe7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-74f0-831e-0ed700ffc07f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019e4604-2121-7a60-af94-ef7328ed2fe7" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-74f0-831e-0ed700ffc07f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-74f0-831e-0ed700ffc07f_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-74f0-831e-0ed700ffc07f" xlink:to="loc_dei_EntityDomain_019e4604-2121-74f0-831e-0ed700ffc07f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7e45-ba00-67c8c37a2560" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-74f0-831e-0ed700ffc07f" xlink:to="loc_dei_EntityDomain_019e4604-2121-7e45-ba00-67c8c37a2560" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-73aa-8e0a-e11e6f0119d9" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7e45-ba00-67c8c37a2560" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-73aa-8e0a-e11e6f0119d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ad5-bd52-99df6278f8e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationTable_019e4604-2121-7a60-af94-ef7328ed2fe7" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ad5-bd52-99df6278f8e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7ad5-bd52-99df6278f8e6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ad5-bd52-99df6278f8e6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7ad5-bd52-99df6278f8e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7a23-9ac3-cc4602d46845" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ad5-bd52-99df6278f8e6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7a23-9ac3-cc4602d46845" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-79a2-aa9d-e6ed8e910898" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7a23-9ac3-cc4602d46845" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-79a2-aa9d-e6ed8e910898" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7b7d-ae68-56afc07b394b" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7a23-9ac3-cc4602d46845" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7b7d-ae68-56afc07b394b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_OtherCommodityContractMember_019e4604-2121-79ba-9f86-95cb57080c09" xlink:href="dte-20260630.xsd#dte_OtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7a23-9ac3-cc4602d46845" xlink:to="loc_dte_OtherCommodityContractMember_019e4604-2121-79ba-9f86-95cb57080c09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019e4604-2121-790f-a2c9-3c774cc4df5f" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_019e4604-2121-7db2-b64a-5be0b0778d8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_019e4604-2121-7db2-b64a-5be0b0778d8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3_019e4604-2121-7f25-8cbe-ba5e1f5dad43" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3_019e4604-2121-7f25-8cbe-ba5e1f5dad43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3_019e4604-2121-782b-a32a-3e9da1268a64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3_019e4604-2121-782b-a32a-3e9da1268a64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_019e4604-2121-7469-bbf2-1c4db0acae55" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:to="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_019e4604-2121-7469-bbf2-1c4db0acae55" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_019e4604-2121-737c-83e0-988b0a20cb8f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_019e4604-2121-7469-bbf2-1c4db0acae55" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings_019e4604-2121-737c-83e0-988b0a20cb8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainsLossesRecordedInRegulatoryAssetsLiabilities_019e4604-2121-7c4f-bbca-f168e112fa11" xlink:href="dte-20260630.xsd#dte_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainsLossesRecordedInRegulatoryAssetsLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RealizedInvestmentGainsLossesAbstract_019e4604-2121-7469-bbf2-1c4db0acae55" xlink:to="loc_dte_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainsLossesRecordedInRegulatoryAssetsLiabilities_019e4604-2121-7c4f-bbca-f168e112fa11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlementsAbstract_019e4604-2121-741d-8101-1d6f3138c851" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlementsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationRollForward_019e4604-2121-78e1-bb8c-0b1f237547c6" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlementsAbstract_019e4604-2121-741d-8101-1d6f3138c851" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements_019e4604-2121-714a-aee0-c9b17394017e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPurchasesSalesIssuesSettlementsAbstract_019e4604-2121-741d-8101-1d6f3138c851" xlink:to="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements_019e4604-2121-714a-aee0-c9b17394017e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_019e4604-2121-73d0-b917-34f23314b544" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_019e4604-2121-7f7b-a356-8255c15b46f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019e4604-2121-790f-a2c9-3c774cc4df5f" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss_019e4604-2121-7f7b-a356-8255c15b46f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInRegulatoryAssetsAndLiabilities_019e4604-2121-7f76-8dc3-52cc69e3e3b7" xlink:href="dte-20260630.xsd#dte_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInRegulatoryAssetsAndLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_019e4604-2121-790f-a2c9-3c774cc4df5f" xlink:to="loc_dte_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossIncludedInRegulatoryAssetsAndLiabilities_019e4604-2121-7f76-8dc3-52cc69e3e3b7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueUnobservableInputsRelatedtoLevel3AssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueUnobservableInputsRelatedtoLevel3AssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueUnobservableInputsRelatedtoLevel3AssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e4604-2121-7394-b8d1-5baa20ee19ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e4604-2121-7394-b8d1-5baa20ee19ce" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-7a41-9913-4ec4db75b4ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-7a41-9913-4ec4db75b4ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7a41-9913-4ec4db75b4ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-7a41-9913-4ec4db75b4ef" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7a41-9913-4ec4db75b4ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7ff4-b1dc-6169c2e732cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-7a41-9913-4ec4db75b4ef" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7ff4-b1dc-6169c2e732cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7f87-9828-3f7d0b8b2795" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-7ff4-b1dc-6169c2e732cc" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-7f87-9828-3f7d0b8b2795" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ca7-926b-1ada9616e971" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ca7-926b-1ada9616e971" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7ca7-926b-1ada9616e971_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ca7-926b-1ada9616e971" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7ca7-926b-1ada9616e971_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7abd-83f6-443cfdd84f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7ca7-926b-1ada9616e971" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7abd-83f6-443cfdd84f2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7dbf-9f49-a0d4b5b5ad2f" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7abd-83f6-443cfdd84f2d" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7dbf-9f49-a0d4b5b5ad2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7cc6-b0e2-ea6bb0e5ecd1" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7abd-83f6-443cfdd84f2d" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7cc6-b0e2-ea6bb0e5ecd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019e4604-2121-7c3e-b2f3-4147abcaaf1a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019e4604-2121-7c3e-b2f3-4147abcaaf1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019e4604-2121-7c3e-b2f3-4147abcaaf1a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019e4604-2121-7c3e-b2f3-4147abcaaf1a" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019e4604-2121-7c3e-b2f3-4147abcaaf1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019e4604-2121-7b53-99dd-b292464411b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019e4604-2121-7c3e-b2f3-4147abcaaf1a" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019e4604-2121-7b53-99dd-b292464411b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputCommodityForwardPriceMember_019e4604-2121-79bb-9281-d40e57934301" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MeasurementInputCommodityForwardPriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019e4604-2121-7b53-99dd-b292464411b9" xlink:to="loc_us-gaap_MeasurementInputCommodityForwardPriceMember_019e4604-2121-79bb-9281-d40e57934301" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e4604-2121-7d02-a8ca-8a3745e5b415" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:to="loc_srt_RangeAxis_019e4604-2121-7d02-a8ca-8a3745e5b415" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-7d02-a8ca-8a3745e5b415_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e4604-2121-7d02-a8ca-8a3745e5b415" xlink:to="loc_srt_RangeMember_019e4604-2121-7d02-a8ca-8a3745e5b415_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-2121-751f-90c7-4d4960c239de" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e4604-2121-7d02-a8ca-8a3745e5b415" xlink:to="loc_srt_RangeMember_019e4604-2121-751f-90c7-4d4960c239de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e4604-2121-79bd-9374-865d6c081072" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-751f-90c7-4d4960c239de" xlink:to="loc_srt_MinimumMember_019e4604-2121-79bd-9374-865d6c081072" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e4604-2121-7089-ad97-a05b0dbfb12c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-751f-90c7-4d4960c239de" xlink:to="loc_srt_MaximumMember_019e4604-2121-7089-ad97-a05b0dbfb12c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_019e4604-2121-7235-b913-dac2ce4f8938" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-2121-751f-90c7-4d4960c239de" xlink:to="loc_srt_WeightedAverageMember_019e4604-2121-7235-b913-dac2ce4f8938" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_019e4604-2121-7190-9bce-f7adb0c32805" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e4604-2121-7b4d-9284-44bb1106f558" xlink:to="loc_us-gaap_ValuationTechniqueAxis_019e4604-2121-7190-9bce-f7adb0c32805" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019e4604-2121-7190-9bce-f7adb0c32805_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019e4604-2121-7190-9bce-f7adb0c32805" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019e4604-2121-7190-9bce-f7adb0c32805_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_019e4604-2121-77c8-bccc-9203141385e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_019e4604-2121-7190-9bce-f7adb0c32805" xlink:to="loc_us-gaap_ValuationTechniqueDomain_019e4604-2121-77c8-bccc-9203141385e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019e4604-2121-7da1-bd83-c94471c656a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_019e4604-2121-77c8-bccc-9203141385e3" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_019e4604-2121-7da1-bd83-c94471c656a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-72a8-a19a-00a39e45df75" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e4604-2121-7394-b8d1-5baa20ee19ce" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-72a8-a19a-00a39e45df75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-768e-9156-03cf7b6ad18f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e4604-2121-7394-b8d1-5baa20ee19ce" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-768e-9156-03cf7b6ad18f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetLiabilityNetMeasurementInput_019e4604-2121-7237-a6d5-3cc3d9ea7e30" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetLiabilityNetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e4604-2121-7394-b8d1-5baa20ee19ce" xlink:to="loc_us-gaap_DerivativeAssetLiabilityNetMeasurementInput_019e4604-2121-7237-a6d5-3cc3d9ea7e30" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueCarryingAmountofFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueCarryingAmountofFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueCarryingAmountofFairValueofFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByBalanceSheetGroupingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e4604-2121-7b65-bd58-d7e77ce1d657" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e4604-2121-7b65-bd58-d7e77ce1d657" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-7b65-bd58-d7e77ce1d657_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e4604-2121-7b65-bd58-d7e77ce1d657" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-7b65-bd58-d7e77ce1d657_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e4604-2121-78bc-b4a4-174e73623ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e4604-2121-7b65-bd58-d7e77ce1d657" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e4604-2121-78bc-b4a4-174e73623ee6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-78d5-b247-93f3630a98be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e4604-2121-78bc-b4a4-174e73623ee6" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-78d5-b247-93f3630a98be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e4604-2121-75f9-b06b-b0de2073703c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-78d5-b247-93f3630a98be" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e4604-2121-75f9-b06b-b0de2073703c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e4604-2121-7108-82f1-2daff67a7d26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e4604-2121-78d5-b247-93f3630a98be" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e4604-2121-7108-82f1-2daff67a7d26" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-73ca-bc66-330d6545c23a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-73ca-bc66-330d6545c23a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-73ca-bc66-330d6545c23a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-73ca-bc66-330d6545c23a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-73ca-bc66-330d6545c23a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-701a-9cf6-3ae404bbc262" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e4604-2121-73ca-bc66-330d6545c23a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-701a-9cf6-3ae404bbc262" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-7d55-8121-f003726ac143" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-701a-9cf6-3ae404bbc262" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019e4604-2121-7d55-8121-f003726ac143" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7948-83be-333584a123f4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-701a-9cf6-3ae404bbc262" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e4604-2121-7948-83be-333584a123f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-74df-8633-fc323af74182" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e4604-2121-701a-9cf6-3ae404bbc262" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019e4604-2121-74df-8633-fc323af74182" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-72a3-8244-32bd45b892b8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-72a3-8244-32bd45b892b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-72a3-8244-32bd45b892b8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-72a3-8244-32bd45b892b8" xlink:to="loc_dei_EntityDomain_019e4604-2121-72a3-8244-32bd45b892b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7cbe-b677-1556166a59fd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-72a3-8244-32bd45b892b8" xlink:to="loc_dei_EntityDomain_019e4604-2121-7cbe-b677-1556166a59fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-71fb-a1b2-2405b264fac0" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7cbe-b677-1556166a59fd" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-71fb-a1b2-2405b264fac0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7570-b382-ed35c2a34406" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_019e4604-2121-75a5-b9e9-214fb7f6618d" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7570-b382-ed35c2a34406" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7570-b382-ed35c2a34406_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7570-b382-ed35c2a34406" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-7570-b382-ed35c2a34406_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019e4604-2121-70c2-8f07-b836fdffd428" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019e4604-2121-7570-b382-ed35c2a34406" xlink:to="loc_us-gaap_RelatedPartyDomain_019e4604-2121-70c2-8f07-b836fdffd428" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019e4604-2121-7568-89a9-742454cf7f65" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019e4604-2121-70c2-8f07-b836fdffd428" xlink:to="loc_srt_AffiliatedEntityMember_019e4604-2121-7568-89a9-742454cf7f65" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableFairValueDisclosure_019e4604-2121-75a8-9ec9-0a254c7f6b72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesReceivableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:to="loc_us-gaap_NotesReceivableFairValueDisclosure_019e4604-2121-75a8-9ec9-0a254c7f6b72" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShorttermDebtFairValue_019e4604-2121-7f6b-86fc-8c6dda864a17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShorttermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:to="loc_us-gaap_ShorttermDebtFairValue_019e4604-2121-7f6b-86fc-8c6dda864a17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableFairValueDisclosure_019e4604-2121-729d-b314-43b610ed21e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NotesPayableFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:to="loc_us-gaap_NotesPayableFairValueDisclosure_019e4604-2121-729d-b314-43b610ed21e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e4604-2121-749c-a534-5056f3149054" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_019e4604-2121-7250-8ba8-ead4ecd9e28b" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e4604-2121-749c-a534-5056f3149054" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueFairValueofNuclearDecommissioningTrustFundAssetsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueFairValueofNuclearDecommissioningTrustFundAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueFairValueofNuclearDecommissioningTrustFundAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-75fb-9fa9-55ed56d9c7eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7f5a-b949-7f3be83067ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-75fb-9fa9-55ed56d9c7eb" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7f5a-b949-7f3be83067ec" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-75a2-9fa3-4346748000e2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7f5a-b949-7f3be83067ec" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-75a2-9fa3-4346748000e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-75a2-9fa3-4346748000e2_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-75a2-9fa3-4346748000e2" xlink:to="loc_dei_EntityDomain_019e4604-2121-75a2-9fa3-4346748000e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7651-9c6b-024be6a1ce3b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-75a2-9fa3-4346748000e2" xlink:to="loc_dei_EntityDomain_019e4604-2121-7651-9c6b-024be6a1ce3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7ce0-a58b-37171ca274c2" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7651-9c6b-024be6a1ce3b" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7ce0-a58b-37171ca274c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7534-b497-96730e5ba995" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7f5a-b949-7f3be83067ec" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7534-b497-96730e5ba995" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7534-b497-96730e5ba995_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7534-b497-96730e5ba995" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7534-b497-96730e5ba995_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7fd0-98ea-a7e1ef22a1e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7534-b497-96730e5ba995" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7fd0-98ea-a7e1ef22a1e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-75d0-8b34-c33933cbc6c0" xlink:href="dte-20260630.xsd#dte_NuclearDecommissioningTrustFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7fd0-98ea-a7e1ef22a1e6" xlink:to="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-75d0-8b34-c33933cbc6c0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilityAxis_019e4604-2121-7a8f-991e-f732d54a5e6c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PublicUtilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7f5a-b949-7f3be83067ec" xlink:to="loc_us-gaap_PublicUtilityAxis_019e4604-2121-7a8f-991e-f732d54a5e6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7a8f-991e-f732d54a5e6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilityAxis_019e4604-2121-7a8f-991e-f732d54a5e6c" xlink:to="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7a8f-991e-f732d54a5e6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7ca1-8ec2-7ce3e290a7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UtilityPlantDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilityAxis_019e4604-2121-7a8f-991e-f732d54a5e6c" xlink:to="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7ca1-8ec2-7ce3e290a7d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NuclearPlantMember_019e4604-2121-7016-8c96-e7eba0ff9ee5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NuclearPlantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7ca1-8ec2-7ce3e290a7d8" xlink:to="loc_us-gaap_NuclearPlantMember_019e4604-2121-7016-8c96-e7eba0ff9ee5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearPlant1Member_019e4604-2121-76f7-a663-2a0504028b47" xlink:href="dte-20260630.xsd#dte_NuclearPlant1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7ca1-8ec2-7ce3e290a7d8" xlink:to="loc_dte_NuclearPlant1Member_019e4604-2121-76f7-a663-2a0504028b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LowLevelRadioactiveWasteMember_019e4604-2121-7f99-9520-28c0262ad321" xlink:href="dte-20260630.xsd#dte_LowLevelRadioactiveWasteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UtilityPlantDomain_019e4604-2121-7ca1-8ec2-7ce3e290a7d8" xlink:to="loc_dte_LowLevelRadioactiveWasteMember_019e4604-2121-7f99-9520-28c0262ad321" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecommissioningFundInvestments_019e4604-2121-760c-bbd3-c9857dd322f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DecommissioningFundInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-75fb-9fa9-55ed56d9c7eb" xlink:to="loc_us-gaap_DecommissioningFundInvestments_019e4604-2121-760c-bbd3-c9857dd322f7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueRealizedGainsandLossesandProceedsfromSaleofSecuritiesbyNuclearDecommissioningTrustFundsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueRealizedGainsandLossesandProceedsfromSaleofSecuritiesbyNuclearDecommissioningTrustFundsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueRealizedGainsandLossesandProceedsfromSaleofSecuritiesbyNuclearDecommissioningTrustFundsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-785f-b4f6-228c63739db8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7a2f-8656-c1562be993b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-785f-b4f6-228c63739db8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7a2f-8656-c1562be993b2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7840-9ce5-b98ead9c58f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7a2f-8656-c1562be993b2" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7840-9ce5-b98ead9c58f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7840-9ce5-b98ead9c58f0_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7840-9ce5-b98ead9c58f0" xlink:to="loc_dei_EntityDomain_019e4604-2121-7840-9ce5-b98ead9c58f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-72be-bec3-0210f38e302c" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7840-9ce5-b98ead9c58f0" xlink:to="loc_dei_EntityDomain_019e4604-2121-72be-bec3-0210f38e302c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-7d92-898b-33b4829ab1f0" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-72be-bec3-0210f38e302c" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-7d92-898b-33b4829ab1f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7d87-9ec1-f43df3545f08" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7a2f-8656-c1562be993b2" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7d87-9ec1-f43df3545f08" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d87-9ec1-f43df3545f08_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7d87-9ec1-f43df3545f08" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7d87-9ec1-f43df3545f08_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7cf3-bcbf-219d54c2a07c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7d87-9ec1-f43df3545f08" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7cf3-bcbf-219d54c2a07c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-7e5c-966f-776fcfc9139a" xlink:href="dte-20260630.xsd#dte_NuclearDecommissioningTrustFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7cf3-bcbf-219d54c2a07c" xlink:to="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-7e5c-966f-776fcfc9139a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_019e4604-2121-7a69-addf-606f2f6b2b42" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-785f-b4f6-228c63739db8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedGain_019e4604-2121-7a69-addf-606f2f6b2b42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_019e4604-2121-70a5-ac02-66f2082af5ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-785f-b4f6-228c63739db8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleRealizedLoss_019e4604-2121-70a5-ac02-66f2082af5ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e4604-2121-71d3-8efc-9603e94901a0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-785f-b4f6-228c63739db8" xlink:to="loc_us-gaap_ProceedsFromSaleOfAvailableForSaleSecuritiesDebt_019e4604-2121-71d3-8efc-9603e94901a0" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueFairValueandUnrealizedGainsandLossesforNuclearDecommissioningTrustFundsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueFairValueandUnrealizedGainsandLossesforNuclearDecommissioningTrustFundsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueFairValueandUnrealizedGainsandLossesforNuclearDecommissioningTrustFundsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-7d1d-b98f-d71c0afac592" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-7d1d-b98f-d71c0afac592" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7347-b4c6-ab2f6af5ae11" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7347-b4c6-ab2f6af5ae11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7347-b4c6-ab2f6af5ae11_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7347-b4c6-ab2f6af5ae11" xlink:to="loc_dei_EntityDomain_019e4604-2121-7347-b4c6-ab2f6af5ae11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7cec-bc9b-d138a454a798" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7347-b4c6-ab2f6af5ae11" xlink:to="loc_dei_EntityDomain_019e4604-2121-7cec-bc9b-d138a454a798" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-769c-b3d8-feec4d0e9623" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7cec-bc9b-d138a454a798" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-769c-b3d8-feec4d0e9623" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7331-95b8-0d387431eefb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7331-95b8-0d387431eefb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7331-95b8-0d387431eefb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7331-95b8-0d387431eefb" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7331-95b8-0d387431eefb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7b69-8d1e-732e5a13599a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7331-95b8-0d387431eefb" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7b69-8d1e-732e5a13599a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-79af-aedf-96d1182cfdff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7b69-8d1e-732e5a13599a" xlink:to="loc_us-gaap_EquitySecuritiesMember_019e4604-2121-79af-aedf-96d1182cfdff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7e39-abd4-8292da709f51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7b69-8d1e-732e5a13599a" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-7e39-abd4-8292da709f51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-7576-b081-7765bc094f22" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:to="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-7576-b081-7765bc094f22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7576-b081-7765bc094f22_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-7576-b081-7765bc094f22" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7576-b081-7765bc094f22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7e4b-a4c9-7d0f97c62263" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_019e4604-2121-7576-b081-7765bc094f22" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7e4b-a4c9-7d0f97c62263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7a72-b240-0971be2bd2be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7e4b-a4c9-7d0f97c62263" xlink:to="loc_us-gaap_PrivateEquityFundsMember_019e4604-2121-7a72-b240-0971be2bd2be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgeFundsMember_019e4604-2121-721c-8491-f347c70c832b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgeFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_019e4604-2121-7e4b-a4c9-7d0f97c62263" xlink:to="loc_us-gaap_HedgeFundsMember_019e4604-2121-721c-8491-f347c70c832b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7986-9a4b-9ad122de8d78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-75ab-bf7a-cda4975bf6cb" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7986-9a4b-9ad122de8d78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7986-9a4b-9ad122de8d78_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7986-9a4b-9ad122de8d78" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7986-9a4b-9ad122de8d78_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c83-b789-b55aba36cd25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7986-9a4b-9ad122de8d78" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c83-b789-b55aba36cd25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7f43-9d60-9ae07024a0c8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7c83-b789-b55aba36cd25" xlink:to="loc_us-gaap_CashEquivalentsMember_019e4604-2121-7f43-9d60-9ae07024a0c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7cf1-8862-36c8ba488490" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DecommissioningTrustAssetsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-7d1d-b98f-d71c0afac592" xlink:to="loc_us-gaap_DecommissioningTrustAssetsAmount_019e4604-2121-7cf1-8862-36c8ba488490" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedGainBeforeTax_019e4604-2121-7d9f-9e5c-ba782b73476c" xlink:href="dte-20260630.xsd#dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-7d1d-b98f-d71c0afac592" xlink:to="loc_dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedGainBeforeTax_019e4604-2121-7d9f-9e5c-ba782b73476c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedLossBeforeTax_019e4604-2121-7d99-9af4-7cf46d7bf7c8" xlink:href="dte-20260630.xsd#dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-7d1d-b98f-d71c0afac592" xlink:to="loc_dte_DecommissioningFundInvestmentsAccumulatedGrossUnrealizedLossBeforeTax_019e4604-2121-7d99-9af4-7cf46d7bf7c8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FairValueFairValueoftheFixedIncomeSecuritiesHeldinNuclearDecommissioningTrustFundsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FairValueFairValueoftheFixedIncomeSecuritiesHeldinNuclearDecommissioningTrustFundsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FairValueFairValueoftheFixedIncomeSecuritiesHeldinNuclearDecommissioningTrustFundsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7074-9112-c7b89a88cc3f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7074-9112-c7b89a88cc3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7d77-873b-c18251a8bb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7074-9112-c7b89a88cc3f" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7d77-873b-c18251a8bb2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7d77-873b-c18251a8bb2b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7d77-873b-c18251a8bb2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-7d77-873b-c18251a8bb2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-74ff-b1a4-e50a351f47e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019e4604-2121-7d77-873b-c18251a8bb2b" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-74ff-b1a4-e50a351f47e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-700c-9267-1bad30c40a6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019e4604-2121-74ff-b1a4-e50a351f47e9" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_019e4604-2121-700c-9267-1bad30c40a6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7ec9-8dbe-be34e8d421b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_019e4604-2121-7074-9112-c7b89a88cc3f" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7ec9-8dbe-be34e8d421b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7ec9-8dbe-be34e8d421b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7ec9-8dbe-be34e8d421b8" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7ec9-8dbe-be34e8d421b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7269-9c4f-00cebad1ac7b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_019e4604-2121-7ec9-8dbe-be34e8d421b8" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7269-9c4f-00cebad1ac7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-735b-940a-42f964ac74ad" xlink:href="dte-20260630.xsd#dte_NuclearDecommissioningTrustFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_019e4604-2121-7269-9c4f-00cebad1ac7b" xlink:to="loc_dte_NuclearDecommissioningTrustFundMember_019e4604-2121-735b-940a-42f964ac74ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_019e4604-2121-7175-bb78-e4866c7fc41c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_019e4604-2121-7175-bb78-e4866c7fc41c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e4604-2121-72bd-ab23-8982ed7e6d61" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_019e4604-2121-72bd-ab23-8982ed7e6d61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e4604-2121-7534-a000-c05d1c5eb277" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_019e4604-2121-7534-a000-c05d1c5eb277" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e4604-2121-780b-bcc2-c5a4bf08d67e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_019e4604-2121-780b-bcc2-c5a4bf08d67e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e4604-2121-768a-ac24-1cf52d50f396" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_019e4604-2121-714b-a241-0d78c31848e6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_019e4604-2121-768a-ac24-1cf52d50f396" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7766-aba2-3f853d51d4b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7766-aba2-3f853d51d4b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e4604-2121-7f86-856b-43e417ae7dda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e4604-2121-7f86-856b-43e417ae7dda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e4604-2121-7cdc-a634-89f04d162e0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:to="loc_us-gaap_NondesignatedMember_019e4604-2121-7cdc-a634-89f04d162e0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-78e0-a41a-361119cef8df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-78e0-a41a-361119cef8df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e4604-2121-707a-af34-a4225ea18a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_us-gaap_InterestRateContractMember_019e4604-2121-707a-af34-a4225ea18a5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e4e-8cb4-5030a213f8a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e4e-8cb4-5030a213f8a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7e6a-b9cf-dac9de4cee17" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7e6a-b9cf-dac9de4cee17" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-70ac-9bd6-0a290d824ea7" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-70ac-9bd6-0a290d824ea7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7bc9-95dd-1e6eb92f5b6c" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7bc9-95dd-1e6eb92f5b6c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7501-ab19-148ca5be009e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7501-ab19-148ca5be009e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7c5f-90a0-f795b8370e5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7c5f-90a0-f795b8370e5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-78dd-bb0f-801de4f3a625" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-78dd-bb0f-801de4f3a625" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsFairValueofDerivativeInstrumentsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7766-aba2-3f853d51d4b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7766-aba2-3f853d51d4b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7766-aba2-3f853d51d4b5" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e4604-2121-7f86-856b-43e417ae7dda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e4604-2121-7f86-856b-43e417ae7dda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e4604-2121-7cdc-a634-89f04d162e0c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7a3f-a7da-a0c3d3f93d51" xlink:to="loc_us-gaap_NondesignatedMember_019e4604-2121-7cdc-a634-89f04d162e0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-7f1e-8c4f-cd44748e466b" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-78e0-a41a-361119cef8df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-78e0-a41a-361119cef8df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-78e0-a41a-361119cef8df" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e4604-2121-707a-af34-a4225ea18a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_us-gaap_InterestRateContractMember_019e4604-2121-707a-af34-a4225ea18a5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e4e-8cb4-5030a213f8a1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e4e-8cb4-5030a213f8a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7e6a-b9cf-dac9de4cee17" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-7e6a-b9cf-dac9de4cee17" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-70ac-9bd6-0a290d824ea7" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-70ac-9bd6-0a290d824ea7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7bc9-95dd-1e6eb92f5b6c" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-79f3-806c-1381de845392" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-7bc9-95dd-1e6eb92f5b6c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7c5f-90a0-f795b8370e5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7c5f-90a0-f795b8370e5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-78dd-bb0f-801de4f3a625" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-755b-bc3b-9970d7e8b473" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-78dd-bb0f-801de4f3a625" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7f33-b1fd-0a5d0c584fa2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7f33-b1fd-0a5d0c584fa2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7958-91ff-da1df6d7e573_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7958-91ff-da1df6d7e573_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-7e72-ae98-e4ce3982442e" xlink:href="dte-20260630.xsd#dte_FinancialTransmissionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:to="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-7e72-ae98-e4ce3982442e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7841-a6f8-8022df2e4204_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7841-a6f8-8022df2e4204_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e4604-2121-7cfb-a3cb-13e2f82066e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:to="loc_us-gaap_NondesignatedMember_019e4604-2121-7cfb-a3cb-13e2f82066e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7697-aaee-0ec151cdde4a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:to="loc_dei_EntityDomain_019e4604-2121-7697-aaee-0ec151cdde4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:to="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-732e-8287-6333681e85d6" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-732e-8287-6333681e85d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7df4-8843-626fa9b4b946" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7df4-8843-626fa9b4b946" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities_019e4604-2121-704d-a42d-eabaaaf5e798" xlink:href="dte-20260630.xsd#dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities_019e4604-2121-704d-a42d-eabaaaf5e798" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets_019e4604-2121-704f-a6e0-d1dddc206ad2" xlink:href="dte-20260630.xsd#dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets_019e4604-2121-704f-a6e0-d1dddc206ad2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalCollateralAggregateFairValue_019e4604-2121-7223-9798-1b39860ac02c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalCollateralAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_AdditionalCollateralAggregateFairValue_019e4604-2121-7223-9798-1b39860ac02c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019e4604-2121-7c12-92c3-2976ece35927" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNetLiabilityPositionAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019e4604-2121-7c12-92c3-2976ece35927" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019e4604-2121-76e2-a4f6-d024ac9e0a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019e4604-2121-76e2-a4f6-d024ac9e0a4e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DerivativeNetAssetPositionAggregateFairValue_019e4604-2121-70a5-b2c0-fa4da5ad4df4" xlink:href="dte-20260630.xsd#dte_DerivativeNetAssetPositionAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_DerivativeNetAssetPositionAggregateFairValue_019e4604-2121-70a5-b2c0-fa4da5ad4df4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions_019e4604-2121-768a-9e25-8a933e29194c" xlink:href="dte-20260630.xsd#dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions_019e4604-2121-768a-9e25-8a933e29194c" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsDetailsTextuals_1" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsDetailsTextuals_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsDetailsTextuals_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7958-91ff-da1df6d7e573_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7958-91ff-da1df6d7e573_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7958-91ff-da1df6d7e573" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-7e72-ae98-e4ce3982442e" xlink:href="dte-20260630.xsd#dte_FinancialTransmissionRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7e84-bad7-0c575a2b16d8" xlink:to="loc_dte_FinancialTransmissionRightsMember_019e4604-2121-7e72-ae98-e4ce3982442e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7841-a6f8-8022df2e4204_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7841-a6f8-8022df2e4204_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e4604-2121-7841-a6f8-8022df2e4204" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e4604-2121-7cfb-a3cb-13e2f82066e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e4604-2121-7abe-90be-8231ee519dc5" xlink:to="loc_us-gaap_NondesignatedMember_019e4604-2121-7cfb-a3cb-13e2f82066e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e4604-2121-79e4-8d3e-64027ffeff2d" xlink:to="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7697-aaee-0ec151cdde4a_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:to="loc_dei_EntityDomain_019e4604-2121-7697-aaee-0ec151cdde4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-2121-7697-aaee-0ec151cdde4a" xlink:to="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-2121-732e-8287-6333681e85d6" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-2121-7619-a92a-01e451537326" xlink:to="loc_dte_DTEElectricMember_019e4604-2121-732e-8287-6333681e85d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7df4-8843-626fa9b4b946" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7df4-8843-626fa9b4b946" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities_019e4604-2121-704d-a42d-eabaaaf5e798" xlink:href="dte-20260630.xsd#dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_LettersOfCreditIssuedThatCouldBeUsedToOffsetNetDerivativeLiabilities_019e4604-2121-704d-a42d-eabaaaf5e798" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets_019e4604-2121-704f-a6e0-d1dddc206ad2" xlink:href="dte-20260630.xsd#dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_LettersOfCreditReceivedUsedToOffsetNetDerivativeAssets_019e4604-2121-704f-a6e0-d1dddc206ad2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalCollateralAggregateFairValue_019e4604-2121-7223-9798-1b39860ac02c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalCollateralAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_AdditionalCollateralAggregateFairValue_019e4604-2121-7223-9798-1b39860ac02c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019e4604-2121-7c12-92c3-2976ece35927" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNetLiabilityPositionAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_DerivativeNetLiabilityPositionAggregateFairValue_019e4604-2121-7c12-92c3-2976ece35927" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019e4604-2121-76e2-a4f6-d024ac9e0a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_019e4604-2121-76e2-a4f6-d024ac9e0a4e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DerivativeNetAssetPositionAggregateFairValue_019e4604-2121-70a5-b2c0-fa4da5ad4df4" xlink:href="dte-20260630.xsd#dte_DerivativeNetAssetPositionAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_DerivativeNetAssetPositionAggregateFairValue_019e4604-2121-70a5-b2c0-fa4da5ad4df4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions_019e4604-2121-768a-9e25-8a933e29194c" xlink:href="dte-20260630.xsd#dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e4604-2121-7904-b31c-7385ebe111b9" xlink:to="loc_dte_Remainingamountofoffsetstoderivativenetliabilitypositionsforhardandsofttriggerprovisions_019e4604-2121-768a-9e25-8a933e29194c" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingAssetsLineItems_019e4604-2121-77c3-b2b5-843bb7642e1e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OffsettingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingAssetsTable_019e4604-2121-786d-a405-c9bea78a4a2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OffsettingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019e4604-2121-77c3-b2b5-843bb7642e1e" xlink:to="loc_us-gaap_OffsettingAssetsTable_019e4604-2121-786d-a405-c9bea78a4a2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7bdf-b862-81350787863e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OffsettingAssetsTable_019e4604-2121-786d-a405-c9bea78a4a2f" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7bdf-b862-81350787863e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7bdf-b862-81350787863e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7bdf-b862-81350787863e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-7bdf-b862-81350787863e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-2121-7bdf-b862-81350787863e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-774a-b62c-6caab154f53f" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-2121-774a-b62c-6caab154f53f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7a69-a1be-b050e4b8e85a" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-2121-7a69-a1be-b050e4b8e85a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-78e1-88f0-3eff13887591" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-2121-78e1-88f0-3eff13887591" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e4604-2121-7049-a936-74014934be7a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:to="loc_us-gaap_InterestRateContractMember_019e4604-2121-7049-a936-74014934be7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e91-a904-d999b7888e39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-2121-76f2-a7ca-328ae2803e46" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-2121-7e91-a904-d999b7888e39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019e4604-2121-7c39-a453-a8a335710d4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OffsettingDerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019e4604-2121-77c3-b2b5-843bb7642e1e" xlink:to="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019e4604-2121-7c39-a453-a8a335710d4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7006-9956-df1b06bd7b8e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019e4604-2121-7c39-a453-a8a335710d4c" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7006-9956-df1b06bd7b8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f07-a544-9e89d242eab1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019e4604-2121-7c39-a453-a8a335710d4c" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset_019e4604-2121-7f07-a544-9e89d242eab1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement_019e4604-2121-738b-af67-5ee2a8d95651" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeAssetsAbstract_019e4604-2121-7c39-a453-a8a335710d4c" xlink:to="loc_us-gaap_DerivativeAssetAfterOffsetSubjectToMasterNettingArrangement_019e4604-2121-738b-af67-5ee2a8d95651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019e4604-2121-7bf2-bb6b-673867aa3e80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OffsettingDerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingAssetsLineItems_019e4604-2121-77c3-b2b5-843bb7642e1e" xlink:to="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019e4604-2121-7bf2-bb6b-673867aa3e80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7b93-b43c-0c19d19c3644" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019e4604-2121-7bf2-bb6b-673867aa3e80" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7b93-b43c-0c19d19c3644" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-75e8-aaf5-0aac9ae8b343" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019e4604-2121-7bf2-bb6b-673867aa3e80" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset_019e4604-2121-75e8-aaf5-0aac9ae8b343" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019e4604-2121-7492-b075-9bf08f194a9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OffsettingDerivativeLiabilitiesAbstract_019e4604-2121-7bf2-bb6b-673867aa3e80" xlink:to="loc_us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement_019e4604-2121-7492-b075-9bf08f194a9e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e4604-2121-7e77-9b4d-de2c404ff5e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeTable_019e4604-2121-7e77-9b4d-de2c404ff5e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7cb6-b575-f4ba828dfc6d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e4604-2121-7e77-9b4d-de2c404ff5e3" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e4604-2121-7cb6-b575-f4ba828dfc6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7725-ae18-27a626e04123" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7725-ae18-27a626e04123" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e4604-2121-736d-a9a3-e3e4b2213bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e4604-2121-736d-a9a3-e3e4b2213bf7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e4604-2121-7bf3-930f-09cb494273e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e4604-2121-7bf3-930f-09cb494273e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_019e4604-2121-7497-a7f3-831187f7ae06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_019e4604-2121-7497-a7f3-831187f7ae06" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019e4604-2121-78b6-b5b0-f8aa5abe8dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019e4604-2121-78b6-b5b0-f8aa5abe8dbf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7570-80fc-91b8017665c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7570-80fc-91b8017665c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e4604-2121-7e1b-871e-ce1074680068" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e4604-2121-7e1b-871e-ce1074680068" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e4604-2121-716c-90e8-f4668b646296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e4604-2121-716c-90e8-f4668b646296" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_019e4604-2121-7b47-a9bf-35e1e463351c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_019e4604-2121-7b47-a9bf-35e1e463351c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e4604-2121-764a-ab45-d5505a75c9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e4604-2121-764a-ab45-d5505a75c9ca" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsNettingOffsetsofDerivativeAssetsandLiabilitiesReconciliationtotheStatementsofFinancialPositionDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e4604-2121-7e77-9b4d-de2c404ff5e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeTable_019e4604-2121-7e77-9b4d-de2c404ff5e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7725-ae18-27a626e04123" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e4604-2121-7725-ae18-27a626e04123" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e4604-2121-736d-a9a3-e3e4b2213bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019e4604-2121-736d-a9a3-e3e4b2213bf7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e4604-2121-7bf3-930f-09cb494273e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_019e4604-2121-7bf3-930f-09cb494273e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsCurrent_019e4604-2121-7497-a7f3-831187f7ae06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetsCurrent_019e4604-2121-7497-a7f3-831187f7ae06" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsNoncurrent_019e4604-2121-78b6-b5b0-f8aa5abe8dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_019e4604-2121-786b-b422-f902c8deee67" xlink:to="loc_us-gaap_DerivativeAssetsNoncurrent_019e4604-2121-78b6-b5b0-f8aa5abe8dbf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-2121-7aae-ba7a-865eeeb9e018" xlink:to="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7570-80fc-91b8017665c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e4604-2121-7570-80fc-91b8017665c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e4604-2121-7e1b-871e-ce1074680068" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019e4604-2121-7e1b-871e-ce1074680068" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e4604-2121-716c-90e8-f4668b646296" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilityCollateralRightToReclaimCashOffset_019e4604-2121-716c-90e8-f4668b646296" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesCurrent_019e4604-2121-7b47-a9bf-35e1e463351c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilitiesCurrent_019e4604-2121-7b47-a9bf-35e1e463351c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e4604-2121-764a-ab45-d5505a75c9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLiabilitiesAbstract_019e4604-2121-740c-9161-6a8b97167ff8" xlink:to="loc_us-gaap_DerivativeLiabilitiesNoncurrent_019e4604-2121-764a-ab45-d5505a75c9ca" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-71b3-82fd-763ebc7c5024_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-71b3-82fd-763ebc7c5024_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7843-9c4d-e33fdce6d3c8" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7843-9c4d-e33fdce6d3c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7c3a-8707-491f3a2f6678" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7c3a-8707-491f3a2f6678" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-21f3-76ef-8ecc-723c60df50ea" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-21f3-76ef-8ecc-723c60df50ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71e9-a16d-282894641795" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71e9-a16d-282894641795" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e4604-21f3-7b95-bc66-e9fcdbf8e763" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfIncomeLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:to="loc_us-gaap_StatementOfIncomeLocationBalanceAxis_019e4604-21f3-7b95-bc66-e9fcdbf8e763" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019e4604-21f3-73e5-a364-70077920d1a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019e4604-21f3-73e5-a364-70077920d1a3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails_1" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails_1"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsEffectofDerivativesNotDesignatedasHedgingInstrumentsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e4604-21f3-7ae7-8d7d-1f66b328f376" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-71b3-82fd-763ebc7c5024_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-71b3-82fd-763ebc7c5024_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-71b3-82fd-763ebc7c5024" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7843-9c4d-e33fdce6d3c8" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7843-9c4d-e33fdce6d3c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7c3a-8707-491f3a2f6678" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7c3a-8707-491f3a2f6678" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-21f3-76ef-8ecc-723c60df50ea" xlink:href="dte-20260630.xsd#dte_EnvironmentalandOtherCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_dte_EnvironmentalandOtherCommodityContractMember_019e4604-21f3-76ef-8ecc-723c60df50ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71e9-a16d-282894641795" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-7450-858c-0e308ed36174" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71e9-a16d-282894641795" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019e4604-21f3-73e5-a364-70077920d1a3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e4604-21f3-7a4b-935d-e4305e2078d2" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019e4604-21f3-73e5-a364-70077920d1a3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsCumulativeGrossVolumeofDerivativeContractsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#FinancialandOtherDerivativeInstrumentsCumulativeGrossVolumeofDerivativeContractsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/FinancialandOtherDerivativeInstrumentsCumulativeGrossVolumeofDerivativeContractsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019e4604-21f3-727f-acbf-01626c36b832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019e4604-21f3-7994-9717-56df8854ea45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-21f3-727f-acbf-01626c36b832" xlink:to="loc_us-gaap_DerivativeTable_019e4604-21f3-7994-9717-56df8854ea45" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-761d-81d9-269dd9c852c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019e4604-21f3-7994-9717-56df8854ea45" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-761d-81d9-269dd9c852c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-761d-81d9-269dd9c852c9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-761d-81d9-269dd9c852c9" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-761d-81d9-269dd9c852c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e4604-21f3-761d-81d9-269dd9c852c9" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7b35-9181-0118a351267d" xlink:href="dte-20260630.xsd#dte_NaturalGasCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_dte_NaturalGasCommodityContractMember_019e4604-21f3-7b35-9181-0118a351267d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7725-a21d-dbe5cc39b439" xlink:href="dte-20260630.xsd#dte_ElectricityCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_dte_ElectricityCommodityContractMember_019e4604-21f3-7725-a21d-dbe5cc39b439" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71c5-b4f5-9b8b77bee2e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e4604-21f3-71c5-b4f5-9b8b77bee2e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancialTransmissionRightsCommodityContractMember_019e4604-21f3-7a70-a8e5-62edcb7b054f" xlink:href="dte-20260630.xsd#dte_FinancialTransmissionRightsCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_dte_FinancialTransmissionRightsCommodityContractMember_019e4604-21f3-7a70-a8e5-62edcb7b054f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_RenewableEnergyCommodityContractMember_019e4604-21f3-764d-9110-c9a95a7e4454" xlink:href="dte-20260630.xsd#dte_RenewableEnergyCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_dte_RenewableEnergyCommodityContractMember_019e4604-21f3-764d-9110-c9a95a7e4454" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_CarbonEmissionsCommodityContractMember_019e4604-21f3-76ef-a067-962ec145bafa" xlink:href="dte-20260630.xsd#dte_CarbonEmissionsCommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_dte_CarbonEmissionsCommodityContractMember_019e4604-21f3-76ef-a067-962ec145bafa" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateContractMember_019e4604-21f3-73b4-8e0a-6a792d5e3e37" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e4604-21f3-74ef-b4b6-044dcd9ad230" xlink:to="loc_us-gaap_InterestRateContractMember_019e4604-21f3-73b4-8e0a-6a792d5e3e37" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_019e4604-21f3-73a0-ac4d-fa7416759f23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-21f3-727f-acbf-01626c36b832" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountEnergyMeasure_019e4604-21f3-73a0-ac4d-fa7416759f23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e4604-21f3-711a-b1ea-b588cc8fb88e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-21f3-727f-acbf-01626c36b832" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e4604-21f3-711a-b1ea-b588cc8fb88e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e4604-21f3-7862-b725-72078a1b04f5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountMass"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019e4604-21f3-727f-acbf-01626c36b832" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountMass_019e4604-21f3-7862-b725-72078a1b04f5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/LongTermFinancingsDebtIssuancesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#LongTermFinancingsDebtIssuancesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/LongTermFinancingsDebtIssuancesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-7659-985a-13ed9fdf188e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7337-927f-c8783e7093b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-7659-985a-13ed9fdf188e" xlink:to="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7337-927f-c8783e7093b4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-7540-bbf6-09d89dc2aa2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7337-927f-c8783e7093b4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-7540-bbf6-09d89dc2aa2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7540-bbf6-09d89dc2aa2a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-7540-bbf6-09d89dc2aa2a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7540-bbf6-09d89dc2aa2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-71a5-aab3-c9583c02b6d0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-7540-bbf6-09d89dc2aa2a" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-71a5-aab3-c9583c02b6d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesMember_019e4604-21f3-7ab5-a090-6a6dbc6d174a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgagesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-71a5-aab3-c9583c02b6d0" xlink:to="loc_us-gaap_MortgagesMember_019e4604-21f3-7ab5-a090-6a6dbc6d174a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_JuniorSubordinatedDebtMember_019f595b-5a3f-7da0-b59a-0f9e8247461f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_JuniorSubordinatedDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-71a5-aab3-c9583c02b6d0" xlink:to="loc_us-gaap_JuniorSubordinatedDebtMember_019f595b-5a3f-7da0-b59a-0f9e8247461f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7531-a5a2-4212b676f3ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7337-927f-c8783e7093b4" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7531-a5a2-4212b676f3ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7531-a5a2-4212b676f3ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7531-a5a2-4212b676f3ab" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7531-a5a2-4212b676f3ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-79e3-a02c-3c6a01ba40ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7531-a5a2-4212b676f3ab" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-79e3-a02c-3c6a01ba40ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_February20264.85MortgageBondsMaturingIn2036Member_019e4604-21f3-76d5-ae31-8d1a21daac66" xlink:href="dte-20260630.xsd#dte_February20264.85MortgageBondsMaturingIn2036Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-79e3-a02c-3c6a01ba40ef" xlink:to="loc_dte_February20264.85MortgageBondsMaturingIn2036Member_019e4604-21f3-76d5-ae31-8d1a21daac66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_February20265.55MortgageBondsMaturingIn2056Member_019e4604-21f3-79dc-b8a1-67b98b54802a" xlink:href="dte-20260630.xsd#dte_February20265.55MortgageBondsMaturingIn2056Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-79e3-a02c-3c6a01ba40ef" xlink:to="loc_dte_February20265.55MortgageBondsMaturingIn2056Member_019e4604-21f3-79dc-b8a1-67b98b54802a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-709d-8ce7-8907263395ac" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7337-927f-c8783e7093b4" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-709d-8ce7-8907263395ac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-709d-8ce7-8907263395ac_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-709d-8ce7-8907263395ac" xlink:to="loc_dei_EntityDomain_019e4604-21f3-709d-8ce7-8907263395ac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-79b9-bd59-85f5c19096c2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-709d-8ce7-8907263395ac" xlink:to="loc_dei_EntityDomain_019e4604-21f3-79b9-bd59-85f5c19096c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-75d6-a1d3-f75146855f7d" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-79b9-bd59-85f5c19096c2" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-75d6-a1d3-f75146855f7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e4604-21f3-72c3-9cac-947f1fe27377" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-7659-985a-13ed9fdf188e" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e4604-21f3-72c3-9cac-947f1fe27377" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e4604-21f3-71d3-a5f9-5e6b44167631" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-7659-985a-13ed9fdf188e" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e4604-21f3-71d3-a5f9-5e6b44167631" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/LongTermFinancingsDebtRedemptionsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#LongTermFinancingsDebtRedemptionsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/LongTermFinancingsDebtRedemptionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionLineItems_019e4604-21f3-74de-a416-0decd42a054a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionTable_019e4604-21f3-7a94-880b-7059183c9da9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentRedemptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019e4604-21f3-74de-a416-0decd42a054a" xlink:to="loc_us-gaap_DebtInstrumentRedemptionTable_019e4604-21f3-7a94-880b-7059183c9da9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7e55-a3ce-b77629ee3573" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019e4604-21f3-7a94-880b-7059183c9da9" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7e55-a3ce-b77629ee3573" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7e55-a3ce-b77629ee3573_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7e55-a3ce-b77629ee3573" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7e55-a3ce-b77629ee3573_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-70a5-90d5-0d206746d998" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7e55-a3ce-b77629ee3573" xlink:to="loc_dei_EntityDomain_019e4604-21f3-70a5-90d5-0d206746d998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-7093-a10e-f4305f361825" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-70a5-90d5-0d206746d998" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-7093-a10e-f4305f361825" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-713a-8dd4-8355c25bf4c5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019e4604-21f3-7a94-880b-7059183c9da9" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-713a-8dd4-8355c25bf4c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-713a-8dd4-8355c25bf4c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-713a-8dd4-8355c25bf4c5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-713a-8dd4-8355c25bf4c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7d00-9483-ffd0c3ab9747" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e4604-21f3-713a-8dd4-8355c25bf4c5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7d00-9483-ffd0c3ab9747" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBondsMember_019e4604-21f3-7bec-983c-bf9999f4411a" xlink:href="dte-20260630.xsd#dte_SecuritizationBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7d00-9483-ffd0c3ab9747" xlink:to="loc_dte_SecuritizationBondsMember_019e4604-21f3-7bec-983c-bf9999f4411a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgagesMember_019f595c-e3a9-7628-b5f5-f4b275cc6efd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MortgagesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e4604-21f3-7d00-9483-ffd0c3ab9747" xlink:to="loc_us-gaap_MortgagesMember_019f595c-e3a9-7628-b5f5-f4b275cc6efd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7b55-8cd7-27aefc3a6619" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentRedemptionTable_019e4604-21f3-7a94-880b-7059183c9da9" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7b55-8cd7-27aefc3a6619" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7b55-8cd7-27aefc3a6619_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7b55-8cd7-27aefc3a6619" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7b55-8cd7-27aefc3a6619_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7752-aa64-621fc28721d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7b55-8cd7-27aefc3a6619" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7752-aa64-621fc28721d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBonds5.97Due2026Member_019e4604-21f3-78f4-b25e-7060a884cdfc" xlink:href="dte-20260630.xsd#dte_SecuritizationBonds5.97Due2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7752-aa64-621fc28721d8" xlink:to="loc_dte_SecuritizationBonds5.97Due2026Member_019e4604-21f3-78f4-b25e-7060a884cdfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_June20263.77MortgageBondsMaturingIn2026Member_019f595f-4b90-7351-b764-4051c8733235" xlink:href="dte-20260630.xsd#dte_June20263.77MortgageBondsMaturingIn2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7752-aa64-621fc28721d8" xlink:to="loc_dte_June20263.77MortgageBondsMaturingIn2026Member_019f595f-4b90-7351-b764-4051c8733235" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SecuritizationBonds2.64Due2026Member_019f595e-6a87-7408-83ab-58846b1c46fb" xlink:href="dte-20260630.xsd#dte_SecuritizationBonds2.64Due2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7752-aa64-621fc28721d8" xlink:to="loc_dte_SecuritizationBonds2.64Due2026Member_019f595e-6a87-7408-83ab-58846b1c46fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e4604-21f3-7346-8ac4-7b0ffe05b44f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019e4604-21f3-74de-a416-0decd42a054a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e4604-21f3-7346-8ac4-7b0ffe05b44f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019e4604-21f3-72c6-9b1d-2127cc0a0077" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionLineItems_019e4604-21f3-74de-a416-0decd42a054a" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019e4604-21f3-72c6-9b1d-2127cc0a0077" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/LongTermFinancingsDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#LongTermFinancingsDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/LongTermFinancingsDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7562-9370-647e50747dc2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7562-9370-647e50747dc2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_019e4604-21f3-76a6-85e8-7deb0cc5de09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7562-9370-647e50747dc2" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_019e4604-21f3-76a6-85e8-7deb0cc5de09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e4604-21f3-76a6-85e8-7deb0cc5de09_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e4604-21f3-76a6-85e8-7deb0cc5de09" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e4604-21f3-76a6-85e8-7deb0cc5de09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e4604-21f3-726b-9c01-1bee45e90562" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_019e4604-21f3-76a6-85e8-7deb0cc5de09" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e4604-21f3-726b-9c01-1bee45e90562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_AtTheMarketProgramMember_019e4604-21f3-780a-85ed-546532297a62" xlink:href="dte-20260630.xsd#dte_AtTheMarketProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_019e4604-21f3-726b-9c01-1bee45e90562" xlink:to="loc_dte_AtTheMarketProgramMember_019e4604-21f3-780a-85ed-546532297a62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019f2151-4b52-71dc-89fc-34b62f327fca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7562-9370-647e50747dc2" xlink:to="loc_us-gaap_DebtInstrumentAxis_019f2151-4b52-71dc-89fc-34b62f327fca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f2151-4b52-71dc-89fc-34b62f327fca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f2151-4b52-71dc-89fc-34b62f327fca" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f2151-4b52-71dc-89fc-34b62f327fca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019f2151-4b52-768c-853a-95b35870fda6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019f2151-4b52-71dc-89fc-34b62f327fca" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019f2151-4b52-768c-853a-95b35870fda6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DepartmentOfEnergyTitle17LoanMember_019f2151-4b52-754f-a7f4-063128ce4b47" xlink:href="dte-20260630.xsd#dte_DepartmentOfEnergyTitle17LoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019f2151-4b52-768c-853a-95b35870fda6" xlink:to="loc_dte_DepartmentOfEnergyTitle17LoanMember_019f2151-4b52-754f-a7f4-063128ce4b47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e4604-21f3-7562-9370-647e50747dc2" xlink:to="loc_dei_LegalEntityAxis_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d" xlink:to="loc_dei_EntityDomain_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f8b4d-5a2c-785d-a25b-0b85cf894d06" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f8b4d-5a2c-7a0c-9721-ac5d85ab125d" xlink:to="loc_dei_EntityDomain_019f8b4d-5a2c-785d-a25b-0b85cf894d06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019f8b4d-925a-726c-a3a9-efe6aec10c22" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f8b4d-5a2c-785d-a25b-0b85cf894d06" xlink:to="loc_dte_DTEGasMember_019f8b4d-925a-726c-a3a9-efe6aec10c22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_SaleOfStockAuthorizedAggregateAmount_019e4604-21f3-742c-a5d9-cc0e120db097" xlink:href="dte-20260630.xsd#dte_SaleOfStockAuthorizedAggregateAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_dte_SaleOfStockAuthorizedAggregateAmount_019e4604-21f3-742c-a5d9-cc0e120db097" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractIndexedToIssuersEquityIndexedShares_019e4604-21f3-75c1-bbf6-f0b0eeee1395" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForwardContractIndexedToIssuersEquityIndexedShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_us-gaap_ForwardContractIndexedToIssuersEquityIndexedShares_019e4604-21f3-75c1-bbf6-f0b0eeee1395" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractIndexedToIssuersEquityForwardRate_019e4604-21f3-7db1-ab2a-e152be415670" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForwardContractIndexedToIssuersEquityForwardRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_us-gaap_ForwardContractIndexedToIssuersEquityForwardRate_019e4604-21f3-7db1-ab2a-e152be415670" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019f8b4b-7222-7389-9b53-a6eab27a4f92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019f8b4b-7222-7389-9b53-a6eab27a4f92" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019f8b4c-132b-7c3e-909e-33c4c259bc27" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e4604-21f3-72ad-a11a-f3d5aa4b190a" xlink:to="loc_us-gaap_LongTermDebt_019f8b4c-132b-7c3e-909e-33c4c259bc27" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ShortTermCreditArrangementsandBorrowingsDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#ShortTermCreditArrangementsandBorrowingsDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ShortTermCreditArrangementsandBorrowingsDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShortTermDebtLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfShortTermDebtTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:to="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-7809-8d20-8792038bddd3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-7809-8d20-8792038bddd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7809-8d20-8792038bddd3_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-7809-8d20-8792038bddd3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7809-8d20-8792038bddd3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b12-b5de-1e29dd2dd64d" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-7809-8d20-8792038bddd3" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b12-b5de-1e29dd2dd64d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_019e4604-21f3-74a6-9748-2a07c1d70b36" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b12-b5de-1e29dd2dd64d" xlink:to="loc_srt_ParentCompanyMember_019e4604-21f3-74a6-9748-2a07c1d70b36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7883-9df5-44e7975f909c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7883-9df5-44e7975f909c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7883-9df5-44e7975f909c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7883-9df5-44e7975f909c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7883-9df5-44e7975f909c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7ab1-8d7f-a08a6b892a72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7883-9df5-44e7975f909c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7ab1-8d7f-a08a6b892a72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEEnergyRevolverMember_019e4604-21f3-74af-8a66-f747cb91436d" xlink:href="dte-20260630.xsd#dte_DTEEnergyRevolverMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7ab1-8d7f-a08a6b892a72" xlink:to="loc_dte_DTEEnergyRevolverMember_019e4604-21f3-74af-8a66-f747cb91436d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e4604-21f3-702e-b4c2-d0053a574f5b" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:to="loc_srt_RangeAxis_019e4604-21f3-702e-b4c2-d0053a574f5b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-21f3-702e-b4c2-d0053a574f5b_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e4604-21f3-702e-b4c2-d0053a574f5b" xlink:to="loc_srt_RangeMember_019e4604-21f3-702e-b4c2-d0053a574f5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-21f3-7247-9cd6-c5d61ed1dbc2" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e4604-21f3-702e-b4c2-d0053a574f5b" xlink:to="loc_srt_RangeMember_019e4604-21f3-7247-9cd6-c5d61ed1dbc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e4604-21f3-75d9-985f-ce70c3dc2f30" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-21f3-7247-9cd6-c5d61ed1dbc2" xlink:to="loc_srt_MaximumMember_019e4604-21f3-75d9-985f-ce70c3dc2f30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7fab-af78-7c73dbb95566" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7fab-af78-7c73dbb95566" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7fab-af78-7c73dbb95566_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7fab-af78-7c73dbb95566" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7fab-af78-7c73dbb95566_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-79aa-afd8-76fb352b92e5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7fab-af78-7c73dbb95566" xlink:to="loc_dei_EntityDomain_019e4604-21f3-79aa-afd8-76fb352b92e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-70f7-b2a5-8bbc23609fec" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-79aa-afd8-76fb352b92e5" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-70f7-b2a5-8bbc23609fec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019e4604-21f3-75a1-8a9a-98a1bc81b192" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-79aa-afd8-76fb352b92e5" xlink:to="loc_dte_DTEGasMember_019e4604-21f3-75a1-8a9a-98a1bc81b192" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-732c-a163-f307548d2fd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShortTermDebtTable_019e4604-21f3-7669-b53a-185a168e0042" xlink:to="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-732c-a163-f307548d2fd0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-732c-a163-f307548d2fd0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-732c-a163-f307548d2fd0" xlink:to="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-732c-a163-f307548d2fd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7a93-942d-14f756fa551d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-732c-a163-f307548d2fd0" xlink:to="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7a93-942d-14f756fa551d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019e4604-21f3-7472-94f8-e0e371343334" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7a93-942d-14f756fa551d" xlink:to="loc_us-gaap_LetterOfCreditMember_019e4604-21f3-7472-94f8-e0e371343334" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DemandFinancingAgreementMember_019e4604-21f3-745c-a7c4-523ce18b6fd8" xlink:href="dte-20260630.xsd#dte_DemandFinancingAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7a93-942d-14f756fa551d" xlink:to="loc_dte_DemandFinancingAgreementMember_019e4604-21f3-745c-a7c4-523ce18b6fd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e4604-21f3-7e78-ac2f-b77e9bf11700" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e4604-21f3-7e78-ac2f-b77e9bf11700" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RatioOfIndebtednessToNetCapital1_019e4604-21f3-700e-a4e2-f6a86000293b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RatioOfIndebtednessToNetCapital1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:to="loc_us-gaap_RatioOfIndebtednessToNetCapital1_019e4604-21f3-700e-a4e2-f6a86000293b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancingAgreementMaximumBorrowingCapacity_019e4604-21f3-70dd-89c5-5d8f7dac5a5d" xlink:href="dte-20260630.xsd#dte_FinancingAgreementMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:to="loc_dte_FinancingAgreementMaximumBorrowingCapacity_019e4604-21f3-70dd-89c5-5d8f7dac5a5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_FinancingAgreementAmountOutstanding_019e4604-21f3-705e-a061-b8509d10ad6d" xlink:href="dte-20260630.xsd#dte_FinancingAgreementAmountOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShortTermDebtLineItems_019e4604-21f3-7124-8d7b-5207ac168839" xlink:to="loc_dte_FinancingAgreementAmountOutstanding_019e4604-21f3-705e-a061-b8509d10ad6d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/ShortTermCreditArrangementsandBorrowingsAvailabilityUnderCreditFacilitiesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#ShortTermCreditArrangementsandBorrowingsAvailabilityUnderCreditFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/ShortTermCreditArrangementsandBorrowingsAvailabilityUnderCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_019e4604-21f3-7468-9d46-9743bebbb3d1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e4604-21f3-7468-9d46-9743bebbb3d1" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-79de-a4f2-5a4cc4932362" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:to="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-79de-a4f2-5a4cc4932362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-79de-a4f2-5a4cc4932362_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-79de-a4f2-5a4cc4932362" xlink:to="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-79de-a4f2-5a4cc4932362_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7389-8a2a-8dd2371600ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e4604-21f3-79de-a4f2-5a4cc4932362" xlink:to="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7389-8a2a-8dd2371600ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e4604-21f3-7296-8fc0-238660405d17" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7389-8a2a-8dd2371600ce" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e4604-21f3-7296-8fc0-238660405d17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019e4604-21f3-7fc1-ba42-0798e870745b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e4604-21f3-7389-8a2a-8dd2371600ce" xlink:to="loc_us-gaap_LetterOfCreditMember_019e4604-21f3-7fc1-ba42-0798e870745b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7fed-92dd-f58fd7f17c43" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7fed-92dd-f58fd7f17c43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7fed-92dd-f58fd7f17c43_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7fed-92dd-f58fd7f17c43" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7fed-92dd-f58fd7f17c43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e4604-21f3-7fed-92dd-f58fd7f17c43" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_UnsecuredRevolvingCreditFacilityExpiringInOctober2030Member_019e4604-21f3-7654-a5a8-2546a1822e5d" xlink:href="dte-20260630.xsd#dte_UnsecuredRevolvingCreditFacilityExpiringInOctober2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_UnsecuredRevolvingCreditFacilityExpiringInOctober2030Member_019e4604-21f3-7654-a5a8-2546a1822e5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInMay2028Member_019e4604-21f3-7aa9-a496-5e0cdef069aa" xlink:href="dte-20260630.xsd#dte_UnsecuredLetterOfCreditFacilityExpiringInMay2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInMay2028Member_019e4604-21f3-7aa9-a496-5e0cdef069aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInFebruary2027Member_019e4604-21f3-763a-8422-0c31df303b64" xlink:href="dte-20260630.xsd#dte_UnsecuredLetterOfCreditFacilityExpiringInFebruary2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInFebruary2027Member_019e4604-21f3-763a-8422-0c31df303b64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInJune2028Member_019e4604-21f3-776e-bbfc-3528d293f1f1" xlink:href="dte-20260630.xsd#dte_UnsecuredLetterOfCreditFacilityExpiringInJune2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_UnsecuredLetterOfCreditFacilityExpiringInJune2028Member_019e4604-21f3-776e-bbfc-3528d293f1f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A75MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7e3d-bb58-44c330ef9950" xlink:href="dte-20260630.xsd#dte_A75MillionUnsecuredLetterOfCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_A75MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7e3d-bb58-44c330ef9950" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_UnsecuredRevolvingCreditFacilityExpiringInDecember2026Member_019e4604-21f3-74f8-9f8c-664561becf0e" xlink:href="dte-20260630.xsd#dte_UnsecuredRevolvingCreditFacilityExpiringInDecember2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_UnsecuredRevolvingCreditFacilityExpiringInDecember2026Member_019e4604-21f3-74f8-9f8c-664561becf0e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A225MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7410-88b6-30bb7b09b6c7" xlink:href="dte-20260630.xsd#dte_A225MillionUnsecuredLetterOfCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_A225MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7410-88b6-30bb7b09b6c7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_A150MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7afa-a191-b164d407c9b5" xlink:href="dte-20260630.xsd#dte_A150MillionUnsecuredLetterOfCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e4604-21f3-7497-a859-e0c4f4ed4594" xlink:to="loc_dte_A150MillionUnsecuredLetterOfCreditFacilityMember_019e4604-21f3-7afa-a191-b164d407c9b5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-77ea-8fcd-cbf93cb9d940" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-77ea-8fcd-cbf93cb9d940" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-77ea-8fcd-cbf93cb9d940_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-77ea-8fcd-cbf93cb9d940" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-77ea-8fcd-cbf93cb9d940_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b10-9104-71262ac6158e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019e4604-21f3-77ea-8fcd-cbf93cb9d940" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b10-9104-71262ac6158e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_019e4604-21f3-72ca-86f7-cd7d22fb9cd1" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019e4604-21f3-7b10-9104-71262ac6158e" xlink:to="loc_srt_ParentCompanyMember_019e4604-21f3-72ca-86f7-cd7d22fb9cd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7468-b743-6ed630bab315" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_019e4604-21f3-7466-9a0b-ff10d6794388" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7468-b743-6ed630bab315" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7468-b743-6ed630bab315_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7468-b743-6ed630bab315" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7468-b743-6ed630bab315_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7a4a-83ae-ca74a0e5f580" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7468-b743-6ed630bab315" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7a4a-83ae-ca74a0e5f580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-7619-971f-1c403bee1f08" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-7a4a-83ae-ca74a0e5f580" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-7619-971f-1c403bee1f08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019e4604-21f3-7b40-aede-160791509ca1" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-7a4a-83ae-ca74a0e5f580" xlink:to="loc_dte_DTEGasMember_019e4604-21f3-7b40-aede-160791509ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e4604-21f3-7f06-8d67-d88ad309b48f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e4604-21f3-7468-9d46-9743bebbb3d1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e4604-21f3-7f06-8d67-d88ad309b48f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e4604-21f3-75cc-b528-52411c9cd502" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e4604-21f3-7468-9d46-9743bebbb3d1" xlink:to="loc_us-gaap_LineOfCredit_019e4604-21f3-75cc-b528-52411c9cd502" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019e4604-21f3-7663-9326-67d075c42133" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_019e4604-21f3-7468-9d46-9743bebbb3d1" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019e4604-21f3-7663-9326-67d075c42133" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/LeasesDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#LeasesDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/LeasesDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionLineItems_019e4604-21f3-7140-8ce4-a99ca37765f0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionTable_019e4604-21f3-7691-a380-0f09e050c747" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LessorLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019e4604-21f3-7140-8ce4-a99ca37765f0" xlink:to="loc_us-gaap_LessorLeaseDescriptionTable_019e4604-21f3-7691-a380-0f09e050c747" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019f2165-42c1-7c39-807a-d1a8f134e619" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_019e4604-21f3-7691-a380-0f09e050c747" xlink:to="loc_dei_LegalEntityAxis_019f2165-42c1-7c39-807a-d1a8f134e619" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f2165-42c1-7c39-807a-d1a8f134e619_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019f2165-42c1-7c39-807a-d1a8f134e619" xlink:to="loc_dei_EntityDomain_019f2165-42c1-7c39-807a-d1a8f134e619_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019f2165-42c1-71e3-95fe-2f0fd69dc7d9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019f2165-42c1-7c39-807a-d1a8f134e619" xlink:to="loc_dei_EntityDomain_019f2165-42c1-71e3-95fe-2f0fd69dc7d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019f2165-42c1-75fe-aab1-d007277fb6d9" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019f2165-42c1-71e3-95fe-2f0fd69dc7d9" xlink:to="loc_dte_DTEElectricMember_019f2165-42c1-75fe-aab1-d007277fb6d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f5962-543f-7770-8fa6-5de42383e5f8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019e4604-21f3-7140-8ce4-a99ca37765f0" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_019f5962-543f-7770-8fa6-5de42383e5f8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/CommitmentsandContingenciesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#CommitmentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/CommitmentsandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-734b-9a17-95ffad41c6c8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-734b-9a17-95ffad41c6c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-734b-9a17-95ffad41c6c8_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-734b-9a17-95ffad41c6c8" xlink:to="loc_dei_EntityDomain_019e4604-21f3-734b-9a17-95ffad41c6c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-752e-b455-4d75104923b0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-734b-9a17-95ffad41c6c8" xlink:to="loc_dei_EntityDomain_019e4604-21f3-752e-b455-4d75104923b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-7e9b-930b-ec947a71b836" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-752e-b455-4d75104923b0" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-7e9b-930b-ec947a71b836" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019e4604-21f3-75a8-afde-081f12a3d3bb" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-752e-b455-4d75104923b0" xlink:to="loc_dte_DTEGasMember_019e4604-21f3-75a8-afde-081f12a3d3bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ToshibaAmericaEnergySystemsAndToshibaCorporationMember_019e4604-21f3-7619-a4e6-b4bd52e1cb54" xlink:href="dte-20260630.xsd#dte_ToshibaAmericaEnergySystemsAndToshibaCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-752e-b455-4d75104923b0" xlink:to="loc_dte_ToshibaAmericaEnergySystemsAndToshibaCorporationMember_019e4604-21f3-7619-a4e6-b4bd52e1cb54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e4604-21f3-758c-9392-7f27fd7fc6fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e4604-21f3-758c-9392-7f27fd7fc6fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-758c-9392-7f27fd7fc6fc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e4604-21f3-758c-9392-7f27fd7fc6fc" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-758c-9392-7f27fd7fc6fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-7c39-a16c-100b9400b685" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationContingencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyAxis_019e4604-21f3-758c-9392-7f27fd7fc6fc" xlink:to="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-7c39-a16c-100b9400b685" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LegacyCCRSurfaceImpoundmentsAndCCRManagementUnitsMember_019e4604-21f3-7f14-936e-13388b7f944e" xlink:href="dte-20260630.xsd#dte_LegacyCCRSurfaceImpoundmentsAndCCRManagementUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-7c39-a16c-100b9400b685" xlink:to="loc_dte_LegacyCCRSurfaceImpoundmentsAndCCRManagementUnitsMember_019e4604-21f3-7f14-936e-13388b7f944e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_CoalCombustionResidualAndEffluentLimitationsGuidelinesRulesCapitalExpendituresMember_019e4604-21f3-7d6d-ba6d-efb8fad06fd1" xlink:href="dte-20260630.xsd#dte_CoalCombustionResidualAndEffluentLimitationsGuidelinesRulesCapitalExpendituresMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationContingencyDomain_019e4604-21f3-7c39-a16c-100b9400b685" xlink:to="loc_dte_CoalCombustionResidualAndEffluentLimitationsGuidelinesRulesCapitalExpendituresMember_019e4604-21f3-7d6d-ba6d-efb8fad06fd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationSiteAxis_019e4604-21f3-7794-80e3-7b6ec958dae5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationSiteAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_EnvironmentalRemediationSiteAxis_019e4604-21f3-7794-80e3-7b6ec958dae5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7794-80e3-7b6ec958dae5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationSiteDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EnvironmentalRemediationSiteAxis_019e4604-21f3-7794-80e3-7b6ec958dae5" xlink:to="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7794-80e3-7b6ec958dae5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7f49-8112-3fcfd21ccc80" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EnvironmentalRemediationSiteDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EnvironmentalRemediationSiteAxis_019e4604-21f3-7794-80e3-7b6ec958dae5" xlink:to="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7f49-8112-3fcfd21ccc80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_CleanUpCompletedandSiteClosedMember_019e4604-21f3-7bcc-b9bb-9c554fce6430" xlink:href="dte-20260630.xsd#dte_CleanUpCompletedandSiteClosedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7f49-8112-3fcfd21ccc80" xlink:to="loc_dte_CleanUpCompletedandSiteClosedMember_019e4604-21f3-7bcc-b9bb-9c554fce6430" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PartialClosureCompleteMember_019e4604-21f3-7ae4-a462-5a8def14b4e7" xlink:href="dte-20260630.xsd#dte_PartialClosureCompleteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EnvironmentalRemediationSiteDomain_019e4604-21f3-7f49-8112-3fcfd21ccc80" xlink:to="loc_dte_PartialClosureCompleteMember_019e4604-21f3-7ae4-a462-5a8def14b4e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7078-82fa-a32ddb19bebc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GuaranteeObligationsByNatureAxis_019e4604-21f3-7286-a3a2-ecf4e1dbf1cc" xlink:to="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7078-82fa-a32ddb19bebc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ReducedEmissionsFuelGuaranteesMember_019e4604-21f3-7f29-9175-a9d77ac91f7a" xlink:href="dte-20260630.xsd#dte_ReducedEmissionsFuelGuaranteesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7078-82fa-a32ddb19bebc" xlink:to="loc_dte_ReducedEmissionsFuelGuaranteesMember_019e4604-21f3-7f29-9175-a9d77ac91f7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeTypeOtherMember_019e4604-21f3-7f24-83fe-caae4ec3cd43" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeTypeOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7078-82fa-a32ddb19bebc" xlink:to="loc_us-gaap_GuaranteeTypeOtherMember_019e4604-21f3-7f24-83fe-caae4ec3cd43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SuretyBondMember_019e4604-21f3-702c-9be6-d61e4104376d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SuretyBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GuaranteeObligationsNatureDomain_019e4604-21f3-7078-82fa-a32ddb19bebc" xlink:to="loc_us-gaap_SuretyBondMember_019e4604-21f3-702c-9be6-d61e4104376d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019e4604-21f3-7aa6-85c8-23d85fb07ad9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_srt_RangeAxis_019e4604-21f3-7aa6-85c8-23d85fb07ad9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-21f3-7aa6-85c8-23d85fb07ad9_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019e4604-21f3-7aa6-85c8-23d85fb07ad9" xlink:to="loc_srt_RangeMember_019e4604-21f3-7aa6-85c8-23d85fb07ad9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019e4604-21f3-73cc-a5ec-fa30365fda8f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019e4604-21f3-7aa6-85c8-23d85fb07ad9" xlink:to="loc_srt_RangeMember_019e4604-21f3-73cc-a5ec-fa30365fda8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019e4604-21f3-740b-81e2-aa459f45c82e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-21f3-73cc-a5ec-fa30365fda8f" xlink:to="loc_srt_MinimumMember_019e4604-21f3-740b-81e2-aa459f45c82e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019e4604-21f3-7a9d-9a93-fe82b1270d30" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019e4604-21f3-73cc-a5ec-fa30365fda8f" xlink:to="loc_srt_MaximumMember_019e4604-21f3-7a9d-9a93-fe82b1270d30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-781c-91ff-0027cabc00fd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-781c-91ff-0027cabc00fd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-781c-91ff-0027cabc00fd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-781c-91ff-0027cabc00fd" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-781c-91ff-0027cabc00fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-7a67-a8dc-7773e22718cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-781c-91ff-0027cabc00fd" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-7a67-a8dc-7773e22718cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnergyTradingMember_019e4604-21f3-7d9b-91e7-9ded375058fc" xlink:href="dte-20260630.xsd#dte_EnergyTradingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7a67-a8dc-7773e22718cc" xlink:to="loc_dte_EnergyTradingMember_019e4604-21f3-7d9b-91e7-9ded375058fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e4604-21f3-7d13-aedf-6030b3afe7c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e4604-21f3-7d13-aedf-6030b3afe7c0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-7d13-aedf-6030b3afe7c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e4604-21f3-7d13-aedf-6030b3afe7c0" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-7d13-aedf-6030b3afe7c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-79e4-bb2e-8092b850aba3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019e4604-21f3-7d13-aedf-6030b3afe7c0" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-79e4-bb2e-8092b850aba3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember_019e4604-21f3-72a7-8317-78fd09a8a278" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-79e4-bb2e-8092b850aba3" xlink:to="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember_019e4604-21f3-72a7-8317-78fd09a8a278" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember_019e4604-21f3-739f-9182-fc46089b7cd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019e4604-21f3-79e4-bb2e-8092b850aba3" xlink:to="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember_019e4604-21f3-739f-9182-fc46089b7cd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019e4604-21f3-7217-8bf8-55747e077bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019e4604-21f3-7217-8bf8-55747e077bb3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e4604-21f3-7217-8bf8-55747e077bb3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e4604-21f3-7217-8bf8-55747e077bb3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e4604-21f3-7217-8bf8-55747e077bb3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019e4604-21f3-7215-ac86-3170d8ccf25d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019e4604-21f3-7217-8bf8-55747e077bb3" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019e4604-21f3-7215-ac86-3170d8ccf25d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborForceConcentrationRiskMember_019e4604-21f3-78ed-8060-aeca17e6ec85" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LaborForceConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019e4604-21f3-7215-ac86-3170d8ccf25d" xlink:to="loc_us-gaap_LaborForceConcentrationRiskMember_019e4604-21f3-78ed-8060-aeca17e6ec85" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019e4604-21f3-76d2-9956-fd9dcc83149e" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_srt_LitigationCaseAxis_019e4604-21f3-76d2-9956-fd9dcc83149e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-76d2-9956-fd9dcc83149e_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019e4604-21f3-76d2-9956-fd9dcc83149e" xlink:to="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-76d2-9956-fd9dcc83149e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-75f7-a482-23292c2f5dc4" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019e4604-21f3-76d2-9956-fd9dcc83149e" xlink:to="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-75f7-a482-23292c2f5dc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PenaltiesRelatedToEESCokeMember_019e4604-21f3-75e9-991c-ef6ad2169dd8" xlink:href="dte-20260630.xsd#dte_PenaltiesRelatedToEESCokeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-75f7-a482-23292c2f5dc4" xlink:to="loc_dte_PenaltiesRelatedToEESCokeMember_019e4604-21f3-75e9-991c-ef6ad2169dd8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EESCokeCaseRelatedToInstallationOfPollutionControlsAndEstablishingAndFundingAnActionCommitteeForCommunityAirQualityImprovementProjectsMember_019e4604-21f3-711e-bede-a5b23ad31aee" xlink:href="dte-20260630.xsd#dte_EESCokeCaseRelatedToInstallationOfPollutionControlsAndEstablishingAndFundingAnActionCommitteeForCommunityAirQualityImprovementProjectsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-75f7-a482-23292c2f5dc4" xlink:to="loc_dte_EESCokeCaseRelatedToInstallationOfPollutionControlsAndEstablishingAndFundingAnActionCommitteeForCommunityAirQualityImprovementProjectsMember_019e4604-21f3-711e-bede-a5b23ad31aee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LudingtonPlantContractDisputeMember_019e4604-21f3-7253-a5ce-ea523c5a9ea8" xlink:href="dte-20260630.xsd#dte_LudingtonPlantContractDisputeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019e4604-21f3-75f7-a482-23292c2f5dc4" xlink:to="loc_dte_LudingtonPlantContractDisputeMember_019e4604-21f3-7253-a5ce-ea523c5a9ea8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019e4604-21f3-76c0-bde6-67bb676f049c" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_srt_CounterpartyNameAxis_019e4604-21f3-76c0-bde6-67bb676f049c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e4604-21f3-76c0-bde6-67bb676f049c_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019e4604-21f3-76c0-bde6-67bb676f049c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e4604-21f3-76c0-bde6-67bb676f049c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e4604-21f3-7492-9960-1c3f8be1cda8" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019e4604-21f3-76c0-bde6-67bb676f049c" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e4604-21f3-7492-9960-1c3f8be1cda8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricAndConsumersEnergyCompanyMember_019e4604-21f3-7dad-9836-5bc0cd53fb86" xlink:href="dte-20260630.xsd#dte_DTEElectricAndConsumersEnergyCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019e4604-21f3-7492-9960-1c3f8be1cda8" xlink:to="loc_dte_DTEElectricAndConsumersEnergyCompanyMember_019e4604-21f3-7dad-9836-5bc0cd53fb86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusAxis_019e4604-21f3-7540-8fc1-01bd23a52526" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019e4604-21f3-7608-912d-d76a148e344a" xlink:to="loc_us-gaap_LitigationStatusAxis_019e4604-21f3-7540-8fc1-01bd23a52526" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019e4604-21f3-7540-8fc1-01bd23a52526_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_019e4604-21f3-7540-8fc1-01bd23a52526" xlink:to="loc_us-gaap_LitigationStatusDomain_019e4604-21f3-7540-8fc1-01bd23a52526_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019e4604-21f3-7e04-abef-56f8dd8e75e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_019e4604-21f3-7540-8fc1-01bd23a52526" xlink:to="loc_us-gaap_LitigationStatusDomain_019e4604-21f3-7e04-abef-56f8dd8e75e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PendingLitigationMember_019e4604-21f3-7fd4-ae29-fd9042ff16e2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PendingLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_019e4604-21f3-7e04-abef-56f8dd8e75e1" xlink:to="loc_us-gaap_PendingLitigationMember_019e4604-21f3-7fd4-ae29-fd9042ff16e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NumberOfFormerMGPSites_019e4604-21f3-71b7-bd0b-da8c260ab315" xlink:href="dte-20260630.xsd#dte_NumberOfFormerMGPSites"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_NumberOfFormerMGPSites_019e4604-21f3-71b7-bd0b-da8c260ab315" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingenciesGross_019e4604-21f3-7378-86b1-53e2dbe9d7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingenciesGross_019e4604-21f3-7378-86b1-53e2dbe9d7f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e4604-21f3-7f1f-bed3-f266593f25a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetRetirementObligationsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_AssetRetirementObligationsNoncurrent_019e4604-21f3-7f1f-bed3-f266593f25a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019e4604-21f3-70f4-8f10-d4eec9fa529c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019e4604-21f3-70f4-8f10-d4eec9fa529c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PeriodGasUtilityCanAmortizeMgpCosts_019e4604-21f3-7814-985e-ea57cc8652b6" xlink:href="dte-20260630.xsd#dte_PeriodGasUtilityCanAmortizeMgpCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_PeriodGasUtilityCanAmortizeMgpCosts_019e4604-21f3-7814-985e-ea57cc8652b6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LossContingencyCivilPenaltyAccruedValue_019e4604-21f3-7913-b6bf-2971112e5265" xlink:href="dte-20260630.xsd#dte_LossContingencyCivilPenaltyAccruedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_LossContingencyCivilPenaltyAccruedValue_019e4604-21f3-7913-b6bf-2971112e5265" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_LossContingencyRemediationCosts_019e4604-21f3-7a06-a346-3dff550818d4" xlink:href="dte-20260630.xsd#dte_LossContingencyRemediationCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_LossContingencyRemediationCosts_019e4604-21f3-7a06-a346-3dff550818d4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease_019e4604-21f3-7413-997c-68b73d555a33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValuePeriodIncreaseDecrease_019e4604-21f3-7413-997c-68b73d555a33" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualAtCarryingValue_019e4604-21f3-7b41-9732-98d2ff700e56" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyAccrualAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_LossContingencyAccrualAtCarryingValue_019e4604-21f3-7b41-9732-98d2ff700e56" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GuarantorObligationsTermAfterExpirationOfStatutesOfLimitations_019e4604-21f3-7a34-83ad-21b9266d92dc" xlink:href="dte-20260630.xsd#dte_GuarantorObligationsTermAfterExpirationOfStatutesOfLimitations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_GuarantorObligationsTermAfterExpirationOfStatutesOfLimitations_019e4604-21f3-7a34-83ad-21b9266d92dc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_019e4604-21f3-789c-8dfc-723bc0e1ce79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_019e4604-21f3-789c-8dfc-723bc0e1ce79" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019e4604-21f3-749a-8505-4ad261027c82" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GuaranteeObligationsCurrentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_GuaranteeObligationsCurrentCarryingValue_019e4604-21f3-749a-8505-4ad261027c82" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GuarantorObligationsTerm_019e4604-21f3-70bd-a6d4-68392fa07a72" xlink:href="dte-20260630.xsd#dte_GuarantorObligationsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_GuarantorObligationsTerm_019e4604-21f3-70bd-a6d4-68392fa07a72" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityNumberOfEmployees_019e4604-21f3-798e-a573-e0c182182567" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityNumberOfEmployees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dei_EntityNumberOfEmployees_019e4604-21f3-798e-a573-e0c182182567" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019e4604-21f3-7d3e-acd4-77dfadd14a52" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019e4604-21f3-7d3e-acd4-77dfadd14a52" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EstimatedCapitalExpendituresForCurrentFiscalYear_019e4604-21f3-7b90-8c7f-e7d149618705" xlink:href="dte-20260630.xsd#dte_EstimatedCapitalExpendituresForCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_dte_EstimatedCapitalExpendituresForCurrentFiscalYear_019e4604-21f3-7b90-8c7f-e7d149618705" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_019e4604-21f3-7d32-ab6c-753dfe3f62c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LossContingencyDamagesSoughtValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019e4604-21f3-7c9a-8420-aefca1f0734b" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_019e4604-21f3-7d32-ab6c-753dfe3f62c3" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RetirementBenefitsandTrusteedAssetsNetPeriodicBenefitCostsCreditsDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#RetirementBenefitsandTrusteedAssetsNetPeriodicBenefitCostsCreditsDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RetirementBenefitsandTrusteedAssetsNetPeriodicBenefitCostsCreditsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e4604-21f3-7d4b-a6a5-6b01b8565e4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e4604-21f3-7d4b-a6a5-6b01b8565e4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-71a0-bc5e-a56d065022cd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e4604-21f3-7d4b-a6a5-6b01b8565e4c" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-71a0-bc5e-a56d065022cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-71a0-bc5e-a56d065022cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-71a0-bc5e-a56d065022cd" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-71a0-bc5e-a56d065022cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7748-8ff2-de7cebd01890" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-71a0-bc5e-a56d065022cd" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7748-8ff2-de7cebd01890" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e4604-21f3-72be-9d8a-f23394ac3423" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7748-8ff2-de7cebd01890" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e4604-21f3-72be-9d8a-f23394ac3423" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e4604-21f3-77e4-b379-11ad065d9793" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7748-8ff2-de7cebd01890" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e4604-21f3-77e4-b379-11ad065d9793" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7a5a-a632-390a300b70d2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e4604-21f3-7d4b-a6a5-6b01b8565e4c" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7a5a-a632-390a300b70d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7a5a-a632-390a300b70d2_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7a5a-a632-390a300b70d2" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7a5a-a632-390a300b70d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7d98-8553-ab1946cb0546" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7a5a-a632-390a300b70d2" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7d98-8553-ab1946cb0546" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-748b-a1f9-52a504b6e28f" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-7d98-8553-ab1946cb0546" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-748b-a1f9-52a504b6e28f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019e4604-21f3-7395-ada6-9f99c9694269" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019e4604-21f3-7395-ada6-9f99c9694269" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e4604-21f3-750c-b77e-f7282aae57e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e4604-21f3-750c-b77e-f7282aae57e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e4604-21f3-7eb9-8e96-8ef707fe52fa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e4604-21f3-7eb9-8e96-8ef707fe52fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e4604-21f3-7488-8ff6-97eec195a781" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e4604-21f3-7488-8ff6-97eec195a781" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e9386-b37b-729d-9bca-fa5a7374385b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019e9386-b37b-729d-9bca-fa5a7374385b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e4604-21f3-7768-8b45-f734c5530e11" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7fd6-8378-665e9e25c7c3" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e4604-21f3-7768-8b45-f734c5530e11" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/RetirementBenefitsandTrusteedAssetsDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#RetirementBenefitsandTrusteedAssetsDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/RetirementBenefitsandTrusteedAssetsDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7373-85cb-f6c81caba87f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_019e4604-21f3-79df-93a0-33fa78bcffbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7373-85cb-f6c81caba87f" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_019e4604-21f3-79df-93a0-33fa78bcffbc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7895-a1b3-21750f0a8e76" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_019e4604-21f3-79df-93a0-33fa78bcffbc" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7895-a1b3-21750f0a8e76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7895-a1b3-21750f0a8e76_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7895-a1b3-21750f0a8e76" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7895-a1b3-21750f0a8e76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-76f7-9ae4-84882ad0a3fc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7895-a1b3-21750f0a8e76" xlink:to="loc_dei_EntityDomain_019e4604-21f3-76f7-9ae4-84882ad0a3fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-7c68-ab9b-58759faf1402" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-76f7-9ae4-84882ad0a3fc" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-7c68-ab9b-58759faf1402" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEGasMember_019e4604-21f3-7fe2-928f-75beeccef294" xlink:href="dte-20260630.xsd#dte_DTEGasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-76f7-9ae4-84882ad0a3fc" xlink:to="loc_dte_DTEGasMember_019e4604-21f3-7fe2-928f-75beeccef294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-7545-86bc-70b4460587f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_019e4604-21f3-79df-93a0-33fa78bcffbc" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-7545-86bc-70b4460587f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7545-86bc-70b4460587f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-7545-86bc-70b4460587f1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7545-86bc-70b4460587f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7788-b5c1-0c28270fec5d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e4604-21f3-7545-86bc-70b4460587f1" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7788-b5c1-0c28270fec5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e4604-21f3-74b9-ae46-0432627ca236" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7788-b5c1-0c28270fec5d" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e4604-21f3-74b9-ae46-0432627ca236" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e4604-21f3-79c9-8092-a42b1d7fb9aa" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e4604-21f3-7788-b5c1-0c28270fec5d" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_019e4604-21f3-79c9-8092-a42b1d7fb9aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e4604-21f3-7f05-bd11-145c192c55bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7373-85cb-f6c81caba87f" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e4604-21f3-7f05-bd11-145c192c55bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_019e4604-21f3-78d6-a0f1-08e68dc98dac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7373-85cb-f6c81caba87f" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_019e4604-21f3-78d6-a0f1-08e68dc98dac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_019e4604-21f3-7cc3-ab0e-6d54bdbb28ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e4604-21f3-7373-85cb-f6c81caba87f" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_019e4604-21f3-7cc3-ab0e-6d54bdbb28ca" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SegmentandRelatedInformationDetailsTextuals" xlink:type="simple" xlink:href="dte-20260630.xsd#SegmentandRelatedInformationDetailsTextuals"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SegmentandRelatedInformationDetailsTextuals" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7af9-9ff5-be5758cfbf9f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7970-82de-1318d5ed7028" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7af9-9ff5-be5758cfbf9f" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7970-82de-1318d5ed7028" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019e4604-21f3-7a71-b448-08480a0bf6e2" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7970-82de-1318d5ed7028" xlink:to="loc_dei_LegalEntityAxis_019e4604-21f3-7a71-b448-08480a0bf6e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7a71-b448-08480a0bf6e2_default" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7a71-b448-08480a0bf6e2" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7a71-b448-08480a0bf6e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019e4604-21f3-7acd-b0a3-8a8707a141e3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019e4604-21f3-7a71-b448-08480a0bf6e2" xlink:to="loc_dei_EntityDomain_019e4604-21f3-7acd-b0a3-8a8707a141e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEElectricMember_019e4604-21f3-76d4-915f-3dbc2c83cc31" xlink:href="dte-20260630.xsd#dte_DTEElectricMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019e4604-21f3-7acd-b0a3-8a8707a141e3" xlink:to="loc_dte_DTEElectricMember_019e4604-21f3-76d4-915f-3dbc2c83cc31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019e4604-21f3-725d-b3d5-603fed8795ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7af9-9ff5-be5758cfbf9f" xlink:to="loc_us-gaap_NumberOfReportableSegments_019e4604-21f3-725d-b3d5-603fed8795ed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NumberOfElectricUtilityCustomers_019e4604-21f3-7e14-bf51-5e83f2136782" xlink:href="dte-20260630.xsd#dte_NumberOfElectricUtilityCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7af9-9ff5-be5758cfbf9f" xlink:to="loc_dte_NumberOfElectricUtilityCustomers_019e4604-21f3-7e14-bf51-5e83f2136782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_NumberOfGasUtilityCustomers_019e4604-21f3-7b63-890e-abad5f13d1c9" xlink:href="dte-20260630.xsd#dte_NumberOfGasUtilityCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7af9-9ff5-be5758cfbf9f" xlink:to="loc_dte_NumberOfGasUtilityCustomers_019e4604-21f3-7b63-890e-abad5f13d1c9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SegmentandRelatedInformationIntersegmentBillingforGoodsandServicesDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SegmentandRelatedInformationIntersegmentBillingforGoodsandServicesDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SegmentandRelatedInformationIntersegmentBillingforGoodsandServicesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7c17-b837-d8f440442cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7213-880c-3e18f71b6488" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7c17-b837-d8f440442cfd" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7213-880c-3e18f71b6488" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e4604-21f3-79fb-a095-7121645d74c6" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7213-880c-3e18f71b6488" xlink:to="loc_srt_ConsolidationItemsAxis_019e4604-21f3-79fb-a095-7121645d74c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-21f3-79fb-a095-7121645d74c6_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-21f3-79fb-a095-7121645d74c6" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-21f3-79fb-a095-7121645d74c6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-21f3-78d7-8c57-6f10d98c43b0" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-21f3-79fb-a095-7121645d74c6" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-21f3-78d7-8c57-6f10d98c43b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019e4604-21f3-71e1-ab2a-fa337cbc8ac0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-21f3-78d7-8c57-6f10d98c43b0" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019e4604-21f3-71e1-ab2a-fa337cbc8ac0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-718c-8719-3e8261fe1b45" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-7213-880c-3e18f71b6488" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-718c-8719-3e8261fe1b45" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-718c-8719-3e8261fe1b45_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-718c-8719-3e8261fe1b45" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-718c-8719-3e8261fe1b45_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-718c-8719-3e8261fe1b45" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricSegmentMember_019e4604-21f3-742a-b993-6910f8c2a86c" xlink:href="dte-20260630.xsd#dte_ElectricSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:to="loc_dte_ElectricSegmentMember_019e4604-21f3-742a-b993-6910f8c2a86c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GasSegmentMember_019e4604-21f3-775c-b3d3-e0d4340801bd" xlink:href="dte-20260630.xsd#dte_GasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:to="loc_dte_GasSegmentMember_019e4604-21f3-775c-b3d3-e0d4340801bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEVantageSegmentMember_019e4604-21f3-7dba-b5a2-635d69a21292" xlink:href="dte-20260630.xsd#dte_DTEVantageSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:to="loc_dte_DTEVantageSegmentMember_019e4604-21f3-7dba-b5a2-635d69a21292" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnergyTradingSegmentMember_019e4604-21f3-7652-aec6-a56089351466" xlink:href="dte-20260630.xsd#dte_EnergyTradingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7d3f-ad76-6a0d37cd8c18" xlink:to="loc_dte_EnergyTradingSegmentMember_019e4604-21f3-7652-aec6-a56089351466" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_019e4604-21f3-75da-b5de-4c24679596a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedAndUnregulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7c17-b837-d8f440442cfd" xlink:to="loc_us-gaap_RegulatedAndUnregulatedOperatingRevenue_019e4604-21f3-75da-b5de-4c24679596a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnregulatedOperatingRevenue_019e4604-21f3-7ac8-8776-09f7eeb187b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnregulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7c17-b837-d8f440442cfd" xlink:to="loc_us-gaap_UnregulatedOperatingRevenue_019e4604-21f3-7ac8-8776-09f7eeb187b7" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.dteenergy.com/role/SegmentandRelatedInformationProfitLossFinancialDataDetails" xlink:type="simple" xlink:href="dte-20260630.xsd#SegmentandRelatedInformationProfitLossFinancialDataDetails"/>
  <link:definitionLink xlink:role="http://www.dteenergy.com/role/SegmentandRelatedInformationProfitLossFinancialDataDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-77de-a2ab-6b8540bba3f6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-77de-a2ab-6b8540bba3f6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019e4604-21f3-7dc3-85bd-f8939ea64cb3" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-77de-a2ab-6b8540bba3f6" xlink:to="loc_srt_ConsolidationItemsAxis_019e4604-21f3-7dc3-85bd-f8939ea64cb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-21f3-7dc3-85bd-f8939ea64cb3_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-21f3-7dc3-85bd-f8939ea64cb3" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-21f3-7dc3-85bd-f8939ea64cb3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019e4604-21f3-74ea-85c8-4463d3bc4750" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019e4604-21f3-7dc3-85bd-f8939ea64cb3" xlink:to="loc_srt_ConsolidationItemsDomain_019e4604-21f3-74ea-85c8-4463d3bc4750" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019e4604-21f3-723e-af4f-27a2fd4a3f4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-21f3-74ea-85c8-4463d3bc4750" xlink:to="loc_us-gaap_OperatingSegmentsMember_019e4604-21f3-723e-af4f-27a2fd4a3f4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019e4604-21f3-71ca-a7b7-6160dd6d6e4f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-21f3-74ea-85c8-4463d3bc4750" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019e4604-21f3-71ca-a7b7-6160dd6d6e4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019e4604-21f3-7380-ab51-aca2d468f735" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019e4604-21f3-74ea-85c8-4463d3bc4750" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019e4604-21f3-7380-ab51-aca2d468f735" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e4604-21f3-77de-a2ab-6b8540bba3f6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e4604-21f3-7ab5-ae7f-1cf61ad5afbf" xlink:to="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_ElectricSegmentMember_019e4604-21f3-7625-8a55-31b12a24a3c9" xlink:href="dte-20260630.xsd#dte_ElectricSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:to="loc_dte_ElectricSegmentMember_019e4604-21f3-7625-8a55-31b12a24a3c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_GasSegmentMember_019e4604-21f3-7f84-a4ec-02cef5a57747" xlink:href="dte-20260630.xsd#dte_GasSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:to="loc_dte_GasSegmentMember_019e4604-21f3-7f84-a4ec-02cef5a57747" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_DTEVantageSegmentMember_019e4604-21f3-7e4f-a644-7cf5342adfc3" xlink:href="dte-20260630.xsd#dte_DTEVantageSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:to="loc_dte_DTEVantageSegmentMember_019e4604-21f3-7e4f-a644-7cf5342adfc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_EnergyTradingSegmentMember_019e4604-21f3-7c86-a0c6-eff497a7dbab" xlink:href="dte-20260630.xsd#dte_EnergyTradingSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e4604-21f3-7ec4-844e-afcd5ee20c37" xlink:to="loc_dte_EnergyTradingSegmentMember_019e4604-21f3-7c86-a0c6-eff497a7dbab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegulatedOperatingRevenue_019e4604-21f3-7415-9f8b-a4f506d0c0ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RegulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_RegulatedOperatingRevenue_019e4604-21f3-7415-9f8b-a4f506d0c0ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnregulatedOperatingRevenue_019e4604-21f3-7351-be5f-421f90832d90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnregulatedOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_UnregulatedOperatingRevenue_019e4604-21f3-7351-be5f-421f90832d90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_RegulatedAndUnregulatedOperatingExpenseDepreciationAndAmortization_019e4604-21f3-7c5e-9a81-8e4a22bdffed" xlink:href="dte-20260630.xsd#dte_RegulatedAndUnregulatedOperatingExpenseDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_dte_RegulatedAndUnregulatedOperatingExpenseDepreciationAndAmortization_019e4604-21f3-7c5e-9a81-8e4a22bdffed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_019e4604-21f3-7435-9f16-f6cab78740dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_InterestExpense_019e4604-21f3-7435-9f16-f6cab78740dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019e4604-21f3-7e62-9992-197b621d70d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019e4604-21f3-7e62-9992-197b621d70d3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e4604-21f3-7cea-99bd-9348e44f83f7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019e4604-21f3-7cea-99bd-9348e44f83f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e4604-21f3-71cc-960a-fd0787287c25" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e4604-21f3-71cc-960a-fd0787287c25" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e4604-21f3-7442-8447-7800c4da809c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e4604-21f3-7442-8447-7800c4da809c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019e4604-21f3-7bb4-91c1-15e6c600245a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_us-gaap_NetIncomeLoss_019e4604-21f3-7bb4-91c1-15e6c600245a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:href="dte-20260630.xsd#dte_OtherSegmentFinancialDataAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e4604-21f3-7ebc-8295-f9a0629bde6a" xlink:to="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_019e4604-21f3-78f7-9da2-f5e8e6c01747" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:to="loc_us-gaap_EquityMethodInvestments_019e4604-21f3-78f7-9da2-f5e8e6c01747" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dte_PaymentsToAcquireProductiveAssetsIncludingPaymentsToAcquireBusinessesNetOfCashAcquired_019e4604-21f3-7e0a-be1c-f1470a16d784" xlink:href="dte-20260630.xsd#dte_PaymentsToAcquireProductiveAssetsIncludingPaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:to="loc_dte_PaymentsToAcquireProductiveAssetsIncludingPaymentsToAcquireBusinessesNetOfCashAcquired_019e4604-21f3-7e0a-be1c-f1470a16d784" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019e4604-21f3-7ac4-a467-bedc32e4ae64" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:to="loc_us-gaap_Goodwill_019e4604-21f3-7ac4-a467-bedc32e4ae64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019e4604-21f3-79ac-b197-752455b07c4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dte_OtherSegmentFinancialDataAbstract_019e4604-21f3-7b88-b963-f619e532c40a" xlink:to="loc_us-gaap_Assets_019e4604-21f3-79ac-b197-752455b07c4a" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
