come on phr v 1 [I] to start working 开始〔运作〕; 开动: The lights suddenly came on in the cinema. 电影院里的灯突然亮了。 2 come on!spoken 【口】 a) used to tell someone to hurry, or to encourage them to do something 快点！ 加油！〔用于催促某人动作快些或鼓励某人做某事〕: Come on, it's not that hard. 快点，这并不太难。 b) used to tell someone that you do not believe them 得啦！〔用于表示不相信某人〕: Oh come on, don't lie to me! 噢，得啦，别对我撒谎！