(1):

(v. t.) To defeat completely; to terminate; to thwart.

(2):

(n.) A complete check; utter defeat or overthrow.

(3):

(n.) The position in the game of chess when a king is in check and cannot be released, - which ends the game.

(4):

(v. t.) To check (an adversary's king) in such a manner that escape in impossible; to defeat (an adversary) by putting his king in check from which there is no escape.