(1):
(n.) The art of criticism.
(2):
(n.) One who passes a rigorous or captious judgment; one who censures or finds fault; a harsh examiner or judge; a caviler; a carper.
(3):
(n.) One skilled in judging of the merits of literary or artistic works; a connoisseur; an adept; hence, one who examines literary or artistic works, etc., and passes judgment upon them; a reviewer.
(4):
(n.) An act of criticism; a critique.
(5):
(v. i.) To criticise; to play the critic.
(6):
(a.) Of or pertaining to critics or criticism; critical.