(a) (of an actor) walk onto the stage （指演员）出台, 登场, 上场.
(b) (of a sportsman) join a team as a substitute during a match （指运动员）（在比赛中）上场做替补队员
*Robson came on in place of Wilkins ten minutes before the end of the game. 比赛结束前十分钟罗布森上场替代威尔金斯.
(c) (of a bowler in cricket) begin to bowl （指板球投球手）开始投球
*Botham came on to bowl after lunch. 午饭後博瑟姆开始投球.
(d) (also come along) make progress; grow; improve 取得 进步; 生长; 改善; 发展; 发育
*The garden is coming on nicely. 这个花园里花草茂盛.
* Her baby is coming on well. 她的婴儿发育良好.
* His French has come on a lot since he joined the conversation class. 他自从参加了会话班, 法语取得了很大进步.
(e) (also come along) (used in the imperative to encourage sb to do sth, esp to hurry, try harder or make an effort 用于祈使句以鼓励某人做某事, 尤指促其加速、努力或试一试)
*Come on, we'll be late for the theatre. 快点吧, 我们去戏院要迟到了.
* Come along now, someone must know the answer. 试试吧, 一定有人能够回答.
(f) begin 开始
*I think I have a cold coming `on. 我看我要感冒了.
* The rain came on/It ,came on to `rain. 下起雨来了.
* It's getting colder
*winter is coming `on. 天渐冷了, 冬天来了.
(g) (of a film, play, etc) be shown or performed （指电影、戏剧等）上演, 演出
*There's a new play coming on at the local theatre next week. 下星期本地剧院有新戏上演. come on/upon sb/sth (fml 文) meet or find sb/sth by chance 偶然遇见或发现某人[某事物]
*I came upon a group of children playing in the street. 我遇到一群孩子在街上玩耍.