tr.v. check·mat·ed, check·mat·ing, check·mates
1. To move a chess piece placing (an opponent's king) under threat of being taken on the next move with no way of escape or defense possible.
2. To defeat completely.
a. A move in chess that checkmates an opponent's king.
b. The position or condition of a checkmated king.
2. An utter defeat.
Used to declare the checkmate of an opponent's king in chess.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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