/ Dictionary / Index D du: Meaning and Definition of Find definitions for: du Pronunciation: (d, dy Fr. dy), [key] (in names of French derivation) a contraction of de and the article le: Joachim du Bellay. Du. Pronunciation: [key] Duke. Dutch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. d.t.'s duad Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language