Breadcrumb Home > Dictionary > Index L LEM: Meaning and Definition of Find definitions for: LEM Pronunciation: (lem), [key] — pl. LEMs, LEM's. lunar excursion module. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lem (Thesaurus) Lely Lemaître ✖ Related Content Daily Word Quiz: musth Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language