/ Dictionary / Index A all-night: Meaning and Definition of Find definitions for: all-night Pronunciation: (ôl'nīt"), [key] — adj. taking up, extending through, or occurring continually during an entire night; nightlong: an all-night vigil. open all night, as for business; providing services, accommodations, etc., at all hours of the night: an all-night restaurant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: all-night (Thesaurus) allness all-nighter Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language