请问这个英语单词seen是什么意思？

seen美音：[sin]英音：[si:n]
(see的过去分词)

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see

vt.

1. 看见,看到[W][+(that)][+wh-][O3][O4][O7]

He was seen to come out.

有人看见他走出来。

We saw her chatting with her neighbors.

我们看到她在和邻居聊天。

I looked for Mike but couldn't see him in the crowd.

我找过麦克,但是在人群中看不到他。

2. 目睹;经历[W]

They have seen hard times.

他们经历过艰难时世。

3. 理解,领会;发现[W][+(that)][+wh-]

I see what you mean.

我理解你的意思。

4. 将...看作,认为[W][O][(+as)]

We see him as an authority on the subject.

我们把他看作为这方面的权威。

5. 想像,设想[W][(+as)][O4]

6. 察看,查看[+wh-]

Go and see if the car leaks oil.

去看看汽车是否漏油。

7. 注意;务必使...,保证[W][Y][+(that)]

See that the lights are turned off before you leave the office.

在离开办公室前务必把灯关了。