<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Fri Jun 05 16:39:38 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/cef/2026/cef-2026.xsd#SecurityOnly" roleURI="http://xbrl.sec.gov/cef/role/SecurityOnly"/>
  <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"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <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/cef/role/SecurityOnly" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="us-gaap_ClassOfStockDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <loc xlink:type="locator" xlink:label="xflt_ClassIMember" xlink:href="xflt-20260331.xsd#xflt_ClassIMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="xflt_ClassIMember" order="2" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="xflt_ClassAMember" xlink:href="xflt-20260331.xsd#xflt_ClassAMember"/>
<!-- [WMV7][WL7KVE1K60kdImObRpKazAosfqp4ohQEK6HstMahrpa5BhXdku6g7lpccruUdZO0Ldo0pwdOppsSmS1xyCo1hHYi6YOu7gSh6OBoazX7W8G+XyeFTLfhwY3gNk/SZ3rMnrPAgEOvlzQn/7Bg/LKPg7IINtbH1cMWhOmTv5yINfh+IZucBN2l5uUZoQIXIApWMVvLei1ve1GXPigjnhPd+szxAiEOjtowugnIy+9btwCjwge+Mb6DvAWRP+mTgpFFW1wZkLo8sUZ/SMSjYlfdZrBtgqtz0P7P4w6KJhvtV/ZPgtSZ1rfPw2zmFIDURLPWbeh1bH2NDok+kPuvxxu2BxmtO/huUkYfSOEtUunN00ilNEcbGnupqO+G2rly] CSR-->
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="xflt_ClassAMember" order="4" xbrldt:closed="true"/>
  </definitionLink>
</linkbase>
