/ Dictionary / Index L lb.: Meaning and Definition of Find definitions for: lb. Pronunciation: [key] — pl. lbs., lb. pound. L.B. Pronunciation: [key] landing barge. light bomber. bachelor of letters; bachelor of literature. local board. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lb (Thesaurus) lazy tongs lb. ap. Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language