/ Dictionary / Index L L.C.F.: Meaning and Definition of Find definitions for: L.C.F. Pronunciation: [key] lowest common factor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. LCD l'chaim* Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language