run out on 〈口〉 1. 突然离开；不支持；抛弃，遗弃 run out on sb. at a difficult time 在困难时撇下某人不予支持 John ran out on his poor wife. 约翰遗弃他可怜的妻子。 2. 背弃(诺言等)；不履行(协议等) He ran out on his promise to help her. 他背弃了自己帮助她的诺言。 run out on a contract 毁约 3. 逃离 He ran out on the landlady without paying his rent. 他不付女房东房租就溜了。