<http://schema.org/description>
"Those of you who use Google regularly may know about the &amp;quot;define&amp;quot; operator, allowing you to search for the definition of an\u00A0acronym\u00A0or keyword right from Google's search ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/google/2011/05/13/google-updates-its-definitions-service-makes-it-a-lot-more-useful/>