/ Dictionary / Index I isochronism: Meaning and Definition of Find definitions for: i•soch•ro•nism Pronunciation: (ī-sok'ru-niz"um), [key] — n. an isochronal character or action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isochrone isochronize Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language