What is to beat in the game of backgammon, before an antagonist has been able to get his "men" or counters home and withdraw any of them from the board; as, to gammon a person called?

gammon — To beat in the game of backgammon, before an antagonist has been able to get his "men" or counters home and withdraw any of them from the board; as, to gammon a person. (Webster's 1913.)

Sources