(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.