/ Dictionary / Index A addax: Meaning and Definition of Find definitions for: ad•dax Pronunciation: (ad'aks), [key] — n. a large, pale-colored antelope, Addax nasomaculatus, of North Africa, with loosely spiraled horns. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: addax (Thesaurus) Addams added entry Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language