/ Dictionary / Index L L bar: Meaning and Definition of Find definitions for: L bar. Pronunciation: [key] See(def. 2). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lb. ap. lb. av. Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language