head off

US /hed ɔf/
UK /hed ɔf/
"head off" picture
1.

拦截, 阻止, 抢先

to prevent someone or something from going in a particular direction by getting in front of them

:
The police managed to head off the protestors before they reached the embassy.
警方设法在示威者到达大使馆前拦截了他们。
We need to head off the cattle before they wander too far.
我们需要在牛群走得太远之前把它们赶回来
2.

出发, 离开

to leave a place

:
I need to head off now if I want to catch my train.
如果我想赶上火车,我现在需要出发了。
They decided to head off early to avoid traffic.
他们决定早点出发以避开交通堵塞。