/ Dictionary / Index M multilateralize: Meaning and Definition of Find definitions for: mul•ti•lat•er•al•ize Pronunciation: (mul"ti-lat'ur-u-līz"), [key] — -ized, -iz•ing. to open to participation by several nations, organizations, etc.: to multilateralize trade agreements. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. multilateral multilayer Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language