The term 'BE CHECKMATED' is a phrase used in the game of chess, which is a two-player strategy board game. The term means that one player has been defeated by the other, and the game is over. The crossword solutions for this term are 'LOSE', which is a four-letter word meaning to be defeated or to fail to win. Therefore, the crossword solutions for the term 'BE CHECKMATED' can be summarized as 'to be defeated or to fail to win'.