/ Dictionary / Index C cross multiply: Meaning and Definition of Find definitions for: cross' mul'tiply Pronunciation: [key] — Math. Math. to remove fractions from an equation by multiplying each side by the common multiple of the denominators of the fractions of the opposite side. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cross-modality crossness Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language