/ Dictionary / Index L lowest common multiple: Meaning and Definition of Find definitions for: low'est com'mon mul'tiple Pronunciation: [key] — Math. Math. the smallest number that is a common multiple of a given set of numbers. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lowest common denominator Lowestoft Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language