Breadcrumb Home > Dictionary > Index X XX: Meaning and Definition of Find definitions for: XX Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: xx (Thesaurus) X-wave XXXX ✖ Related Content Daily Word Quiz: solecism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language