/ Dictionary / Index L LP: Meaning and Definition of Find definitions for: LP Pronunciation: [key] — pl. LPs, LP's. a phonograph record played at 33 r.p.m.; long-playing record. L.P. Pronunciation: [key] long primer. low pressure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lp (Thesaurus) Lozi LPG Related Content Daily Word Quiz: benevolent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language