The definition of checkmate is a move in the game of chess when the King is trapped and cannot escape or move out of harm's way.(noun)
When you have been finally and completely defeated in a chess game and there is no way for you to come back and win, this is an example of checkmate.
See checkmate in Webster's New World College Dictionary
Origin: ME chek mat < OFr eschec mat, ult. < Pers šāh māt, lit., the king is dead < šāh, king + māt, he is dead
See checkmate in American Heritage Dictionary 4
transitive verb check·mat·ed, check·mat·ing, check·mates
Origin: Middle English chekmat
Origin: , from Old French eschec mat
Origin: , from Arabic šāh māt, the king is dead
Origin: : šāh, king (from Persian shāh; see shah)
Origin: + māt, died (from earlier māta, to die; see mwt in Semitic roots).
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