off
1.
to go to a station, an airport, etc. to say goodbye to sb who is starting a journey
2.
( BrE ) to force sb to leave a place, for example by chasing them :
The dogs saw them off in no time.
3.
( BrE ) to defeat sb in a game, fight, etc. :
The home team saw off the challengers by 68 points to 47.