( sometimes initial capital letter ) resembling or befitting Don Quixote.

extravagantly chivalrous or romantic; visionary, impractical, or impracticable.

impulsive and often rashly unpredictable.

adjective

chimerical , chivalrous , dreaming , dreamy , foolish , impetuous , impractical , impulsive , romantic , starry-eyed , unrealistic , utopian , visionary , capricious , chimerical fanciful , fanciful , idealistic , imaginary , impracticable , unread , whimsical