Source : Webster's Revised Unabridged Dictionary (1913)

Cougar \Cou"gar\ (k??"g?r), n. [F. couguar, from the native name
   in the South American dialects, cuguacuara, cuguacuarana.]
   (Zo["o]l.)
   An American feline quadruped ({Felis concolor}), resembling
   the African panther in size and habits. Its color is tawny,
   without spots; hence writers often called it the {American
   lion}. Called also {puma}, {panther}, {mountain lion}, and
   {catamount}. See {Puma}.

Source : WordNet®

cougar
     n : large American feline resembling a lion [syn: {puma}, {catamount},
          {mountain lion}, {painter}, {panther}, {Felis concolor}]

Source : Free On-Line Dictionary of Computing

Cougar
     
         A former (development) name for the
        {W3C}'s {HTML} 4 standard.
     
        (2001-02-06)