oath /əuθ/ n. ［c］ (pl. oaths /əuðz/) 1. 誓言，誓约： Every U.S. President must take an oath to uphold the constitution. 每一位美国总统必须宣誓支持宪法。 2.咒骂，诅咒语：The carpenter let out a stream of oaths when he hit his thumb with the hammer. 当斧子砸着木匠的拇指时，他气得叫喊不止。3. 用于习语on/under oath保证说真话：The judge reminded the witness that she was under oath.法官提醒证人说话要负法律责任。