副词

At the Airport-(在机场)

1. 在整个夜间；在夜里的某一时刻
If something happens overnight, it happens throughout the night or at some point during the night.

2. 突然；一下子；一夜之间
You can say that something happens overnight when it happens very quickly and unexpectedly.

3. 只供一两晚使用的
Overnight bags or clothes are ones that you take when you go and stay somewhere for one or two nights.

4. 过夜
If you overnight somewhere, you spend the night there.

1. lasting, open, or operating through the whole night

e.g. a nightlong vigil
an all-night drugstore
an overnight trip

Synonym: nightlongall-night