0 the final position in the game of chess when your king cannot escape and you have lost the game -- scacco matto
1 to beat someone in a game of chess by putting the other player’s king in a position where it cannot escape -- dare scacco matto a
2 in chess, a position from which the king cannot escape -- scacco matto
She made her move and declared ‘checkmate’.
3 to put (an opponent’s king) in this position -- dare scacco matto
Within just a few moves he had checkmated his opponent’s king.