You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <searchinfo totalhits="4" />
    <pages>
      <page pageid="2369" ns="0" title="Partnership - Meaning of Partnerships1149186" contentmodel="wikitext" pagelanguage="pl" touched="2014-03-15T17:32:43Z" lastrevid="4005" counter="382" length="3837" new="" />
      <page pageid="2370" ns="0" title="Partnership - Meaning of Partnerships2232664" contentmodel="wikitext" pagelanguage="pl" touched="2014-03-15T17:33:07Z" lastrevid="4006" counter="342" length="3818" new="" />
      <page pageid="2371" ns="0" title="Partnership - Meaning of Partnerships3988832" contentmodel="wikitext" pagelanguage="pl" touched="2014-03-15T17:34:00Z" lastrevid="4007" counter="313" length="3849" new="" />
      <page pageid="4429" ns="0" title="State Of Well Being Meaning" contentmodel="wikitext" pagelanguage="pl" touched="2014-11-26T09:53:12Z" lastrevid="6140" counter="561" length="3228" new="" />
    </pages>
  </query>
</api>