/ Dictionary / Index I IR: Meaning and Definition of Find definitions for: IR Pronunciation: [key] infrared. intelligence ratio. information retrieval. Ir Pronunciation: [key] Irish (def. 4). Ir Pronunciation: [key] — Symbol, Chem. iridium. ir- Pronunciation: [key] var. of (by assimilation) before r: irradiate. ir- Pronunciation: [key] var. of (by assimilation) before r: irreducible. Ir. Pronunciation: [key] Ireland. Irish. I.R. Pronunciation: [key] immediate reserve. infantry reserve. intelligence ratio. internal revenue. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ir (Thesaurus) Iquitos Ira Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language