Source : Webster's Revised Unabridged Dictionary (1913)

Quixotic \Quix*ot"ic\, a.
   Like Don Quixote; romantic to extravagance; absurdly
   chivalric; apt to be deluded. ``Feats of quixotic
   gallantry.'' --Prescott.

Source : WordNet®

quixotic
     adj : not sensible about practical matters; unrealistic; "as
           quixotic as a restoration of medieval knighthood"; "a
           romantic disregard for money"; "a wild-eyed dream of a
           world state" [syn: {romantic}, {wild-eyed}]