An overnight trip; an overnight guest.
An overnight package.
An overnight success.
Let the meat marinate overnight.
Became a sensation overnight.
An overnight guest.
An overnight bag.
Overnighting at a country inn.
If you completely change your personality from one day to the next, this is an example of when your personality changes overnight.
If you go on a trip that lasts from Monday evening until Tuesday morning, this is an example of when you go on a trip overnight.
If you spend one night in New York City, this is an example of an overnight.
If you FedEx something on Monday and it arrives on Tuesday, this is an example of a time when you overnight the package.
If you sleep at your friend's house and leave the next day, this is an example of a time when you overnight.
They delivered the package overnight.
Have you looked at the overnights yet?
We can overnight you the documents for signature.