名词 n.
1.表[C]
2.看守,监视;警戒,注意[S][U]
The would-be murderer was kept under close watch.
那个意欲行凶的人被置于严密监视下。
3.守卫,看守,值班人[the S]
He is on watch.
他在值岗。
4.(海员的)值班时间;值班的海员[C][U]
5.巡夜人[the S][G]
6.【诗】夜间醒时[P1]
及物动词 vt.
1.观看;注视;留神观察[+wh-][O3][O4][O7]
I watched him put on his coat.
我看着他穿上衣服。
He watched them eating.
他看着他们吃东西。
We watched the departure of the train from the station.
我们看着火车驶离车站。
2.小心,留意;提防[+(that)][+wh-]
Watch that the milk doesn't boil over.
小心别让牛奶溢出来。
3.守卫,看守
4.看护,监视
They had her watched by detectives.
他们把她置于侦探的监视之下。
I want you to watch the child while I'm away.
我要你在我不在的时候看管这孩子。
5.等待
不及物动词 vi.
1.注视,观看[+to-v]
I seldom play chess, but I like to watch.
我很少下棋,但是喜欢看。
2.等待,留心[(+for)]
He watched for his chance to propose to her.
他在等待时机向她求婚。
3.当心,注意
We must watch for fires.
我们一定要当心火灾。
4.看守,守卫
5.看护[(+over)]
参考资料：http://dict.baidu.com/s?wd=watch