/ Dictionary / Index D dune: Meaning and Definition of Find definitions for: dune Pronunciation: (dn, dyn), [key] — n. a sand hill or sand ridge formed by the wind, usually in desert regions or near lakes and oceans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dune (Thesaurus) dundrearies dune buggy Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language