Pronunciation: (chek'māt"), [key]
—n., v., -mat•ed, -mat•ing,
1. Also called mate. Chess.
a. an act or instance of maneuvering the opponent's king into a check from which it cannot escape, thus bringing the game to a victorious conclusion.
b. the position of the pieces when a king is checkmated.
2. a complete check; defeat: His efforts to escape met with a checkmate.
1. Chess.to maneuver (an opponent's king) into a check from which it cannot escape; mate.
2. to check completely; defeat: Napoleon was checkmated at Waterloo.
Chess.(used by a player to announce that he or she has put the opponent's king into inextricable check.)
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.