Pronunciation: (ôl'nī'tur), [key]
1. something that lasts, is available, or is open for business throughout the night: The poker game turned into an all-nighter. Are any of the grocery stores all-nighters?
2. an act of staying up all night, as to study or finish a task: I had to pull an all-nighter to get the paper done on time.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.