/ Dictionary / Index M multisyllabic: Meaning and Definition of Find definitions for: mul•ti•syl•lab•ic Pronunciation: (mul"ti-si-lab'ik), [key] — adj. polysyllabic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. multistory multisyllable Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language