IPA: /ˈoʊvərˌnaɪt/
KK: /ˈoʊvərˌnaɪt/
For the duration of one night; happening or being done in a single night.
We decided to stay at the hotel overnight during our road trip.
To stay or spend the night in a place, usually away from home.
We decided to overnight at the hotel during our road trip.
Past: overnighted
Past Participle: overnighted
A stay or trip that lasts for one night.
We booked an overnight at the hotel during our road trip.
To send something by mail or another delivery service so that it arrives the next day.
I will overnight the package to you so you receive it by tomorrow.
Past: overnighted
Past Participle: overnighted
Overnight → It is formed from "over" (from Old English "ofer", meaning above or across) and "night" (from Old English "niht", meaning the period of darkness). The word "overnight" refers to something that occurs during the entire night or from one evening to the next morning.
Think of something happening 'above' or 'across' the 'night' — that's why overnight means during the night.