/ Dictionary / Index D duad: Meaning and Definition of Find definitions for: du•ad Pronunciation: (d'ad, dy'-), [key] — n. a group of two; couple; pair. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: duad (Thesaurus) du dual 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