1 (in sport or competitions) a person who plays against sb (体育运动或比赛)对手,敌手:
They are the toughest opponents we've played against.他们是我们在比赛中遇到过的最难对付的敌手。
2an opponent (of sth) a person who disagrees with sb's actions, plans or beliefs and tries to stop or change them 反对者:
the President's political opponents总统的政敌