wordnet

from WordNet (r) 3.0 (2006)

wordnet
    n 1: any of the machine-readable lexical databases modeled after
         the Princeton WordNet
    2: a machine-readable lexical database organized by meanings;
       developed at Princeton University [syn: {WordNet}, {Princeton
       WordNet}]

from The Free On-line Dictionary of Computing (8 July 2008)

WordNet

   <human language> A large {lexical} database of English,
   developed under the direction of George A. Miller.  Nouns,
   verbs, adjectives and adverbs are grouped into sets of
   {cognitive synonyms} ("synsets"), each expressing a distinct
   concept.  Synsets are interlinked by means of
   conceptual-{semantic} and lexical relations.  The resulting
   network of words and concepts can be navigated with the
   browser.  WordNet is freely available for download.  WordNet's
   structure makes it a useful tool for {computational
   linguistics} and {natural language processing}.

   WordNet home (http://wordnet.princeton.edu/).

   (2007-04-20)