challenge² v [T] 1 to say that you doubt whether something is right, fair, or legal, and try to persuade people to change it 质疑〔某事并设法加以改变〕: She is challenging the decision made by the court. 她正在设法推翻法庭作出的决定。 2 to invite someone to compete against you or to test their ability to do something 向〔某人〕挑战; 邀请〔某人〕比赛: We were challenged to a game of tennis. 我们被邀请参加一场网球赛。