/ Dictionary / Index M multisyllable: Meaning and Definition of Find definitions for: mul•ti•syl•la•ble Pronunciation: (mul'ti-sil"u-bul), [key] — n. polysyllable. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. multisyllabic multitasking 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