- 落下来，掉下来；脱落，落掉：
One of my coat buttons is off.
我上衣的一粒扣子掉了。
- 断掉，关掉；休止：
The lights are off.
灯都关掉了。
- 赶紧离开，走开：
It's late,I must be off.
天色很晚，我必须走了。
Where are you off to?
你上哪儿去?
- 外出；离开(工作)；完成(工作)；下班：
She is off on a seven-day vacation trip.
她外出作7天假期旅行。
What time are you off work tonight?
今晚你什么时候下班?
- 走开，滚开[用于祈使句]：
Be off with you!
去你的!滚你的蛋!
Be off, before I send for the police!
走开，不然我要去叫警察来。
- 没按计划举行；被取消：
The meeting is off because of rain.
因下雨会议取消了。
- (菜单上的菜)已卖完，售完：
I'm sorry,the chicken is off.
对不起，鸡肉卖完了。
- (食物)变味，不新鲜，腐烂：
This meat is slightly off.
这肉有一点变味了。
- 失去对…的兴趣(或欲望)：
I've been off wine and cigarettes.
我对烟酒没什么兴趣了。
- 提供，供应(某物)；配备：
You seem to be well off for clothes.
你看来是不缺衣服穿的。
- (赛马)开始；起跑：
The horses are settling down and they're off!
那些马已各就各位，它们起跑了!
- 停止服用(药物)：
Father was off his medicine.
父亲停止服药了。
- 详细谈起(某题目)，开始啰啰唆唆地讲(on):
He's off on his pet or favourite subject —— himself!
他开始啰啰唆唆地讲他得意或喜欢的那个话题——谈他自己!
- 【戏剧】缺场，未登场