- the move that wins the game by checking the opponent's king so that it cannot be protected
- the condition of the king after such a move
- complete defeat, frustration, etc.
Origin of checkmateMiddle English chek mat from Old French eschec mat, ultimately from Persian š?h m?t, literally , the king is dead from š?h, king + m?t, he is dead
transitive verb-·mat·ed, -·mat·ing
- Chess to place in checkmate
- to defeat completely; frustrate; thwart