/ Dictionary / Index N nighttime: Meaning and Definition of Find definitions for: night•time Pronunciation: (nīt'tīm"), [key] — n. the time between evening and morning. —adj. occurring, done, presented, etc., during the night, esp. the hours before midnight. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nighttime (Thesaurus) nighttide nightwalker Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language