1. to go to the place that someone is leaving from in order to say goodbye to them
为（某人）送行

例句：

My parents saw me off at the airport. 我父母到机场为我送行。

Ben had planned a steak dinner for himself after seeing Jackie off on her plane. 本已经计划好把杰姬送上飞机后自己吃一顿牛排大餐。

I am to see off Mr Brown this afternoon. 今天下午我要为布朗先生送行。

Bill will see off to the airport. 比尔要到飞机场送行。

Can you wait for me while I see off my friend? 我送我的朋友的时候你能等我一会儿吗？

She raised her head to see off her son, her eyes blurred with tears. 翘望着儿子远行的背影，泪水模糊了她的双眼。

2. If you see off an opponent, you defeat them.

There is no reason why they cannot see off the Republican challenge. 他们没有理由在共和党的挑战中败北。

Normally, more generous terms from Deutsche Brse would be enough to see off NASDAQ. 正常情况下，如果德意志交易所提供更慷慨的出价，就将足以挫败纳斯达克。

3. (UK)to send away someone who is attacking you or who is not wanted, usually forcefully
（英式英语）打发走（某人）；（通常指）驱逐（某人），赶走（某人）

例句：

The caretaker ran out and saw off the boys who had been damaging the fence. 管理员跑出来，把那些破坏栅栏的男孩子轰了出去。

The dogs will soon see off any burglars. 这些狗会立即把任何盗贼赶出去。