/ Dictionary / Index X xr: Meaning and Definition of Find definitions for: xr Pronunciation: [key] — Stock Exchange. Stock Exchange. ex rights. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. XQ x-radiation Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language