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