/ Dictionary / Index I IBR: Meaning and Definition of Find definitions for: IBR Pronunciation: [key] infectious bovine rhinotracheitis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ibota privet Ibrahim Pasha Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language