/ Dictionary / Index D dinner jacket: Meaning and Definition of Find definitions for: din'ner jack"et Pronunciation: [key] tuxedo (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dinner fork dinner knife Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language