(1):

(n.) One who has commited a crime; especially, one who is found guilty by verdict, confession, or proof; a malefactor; a felon.

(2):

(a.) Relating to crime; - opposed to civil; as, the criminal code.

(3):

(a.) Involving a crime; of the nature of a crime; - said of an act or of conduct; as, criminal carelessness.

(4):

(a.) Guilty of crime or sin.