柯林斯词典double fault (double faults) 1. N-COUNT In tennis, if a player serves a double fault, they make a mistake with both serves and lose the point. (網球)雙發失誤 返回 double fault剑桥词典(in tennis and some other games ) two mistakes made one after the other by a player who is beginning a game by hitting the ball （指網球等運動中連續兩次發球失誤的）雙誤 返回 double fault