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<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Thu Oct 08 14:58:17 UTC 2026 -->
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  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
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  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:role="http://xbrl.sec.gov/vip/role/BenefitOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="vip_AllBenefitsMember" xlink:href="https://xbrl.sec.gov/vip/2026/vip-2026.xsd#vip_AllBenefitsMember"/>
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    <loc xlink:type="locator" xlink:label="ck0000847552_LincolnProtectedPayAndEstateLockProtectedLifetimeIncomeFeeRateMember" xlink:href="ck0000847552-20261015.xsd#ck0000847552_LincolnProtectedPayAndEstateLockProtectedLifetimeIncomeFeeRateMember"/>
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