/ Dictionary / Index I I-bar: Meaning and Definition of Find definitions for: I-bar Pronunciation: (ī'bär"), [key] — n. an I-beam used for structural support, as in buildings or bridges. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ibáñez IBC 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