/ Dictionary / Index D duc*: Meaning and Definition of Find definitions for: duc Pronunciation: (dyk), [key] — pl. ducs duke. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Dubuque ducal Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language