/ Dictionary / Index L LS: Meaning and Definition of Find definitions for: LS Pronunciation: [key] left side. letter signed. library science. lightship. L.S. Pronunciation: [key] Licentiate in Surgery. Linnaean Society. the place of the seal, as on a document. l.s. Pronunciation: [key] See(def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. LRT LSAT 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