see sb off
(a) go to a railway station, airport, etc to say goodbye to sb who is about to start a journey 到火车站、 飞机场等处为某人送行
We all went to the airport to see her off. 我们都去飞机场为她送行了.
(b) force sb to leave a place, eg by chasing him 强迫某人离开某处(如赶走)
The farmer saw the boys off with a heavy stick. 农场主拿著大棍子把那些男孩子赶跑了.