/əʊ ||; o/(also O) exclamation used for reacting to sth that sb has said, for emphasizing what you are saying, or when you are thinking of what to say next （用于响应、强调或思考）噢，哎呀: ‘I'm a teacher.’ ‘Oh? Where?’ “我是教师。”“噢，在哪里任教？”‘Oh no!’ she cried as she began to read the letter. “哎呀，不好了！”她一读那封信就大叫起来。