/ Dictionary / Index N nightjar: Meaning and Definition of Find definitions for: night•jar Pronunciation: (nīt'jär"), [key] — n. a nocturnal European bird, Caprimulgus europaeus, of the family Caprimulgidae, having a short bill and a wide mouth and feeding on insects captured in the air. Also calledany other nocturnal or crepuscular bird of the family Caprimulgidae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nightjar (Thesaurus) nightingale night jasmine Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language