/ Dictionary / Index L LM: Meaning and Definition of Find definitions for: LM Pronunciation: [key] — (often lem), lunar module. lm Pronunciation: [key] — Optics. Optics. lumen; lumens. L.M. Pronunciation: [key] Licentiate in Medicine. Licentiate in Midwifery. Lord Mayor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lm (Thesaurus) Llyr lm-hr Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language