/ Dictionary / Index M missionize: Meaning and Definition of Find definitions for: mis•sion•ize Pronunciation: (mish'u-nīz"), [key] — v., -ized, -iz•ing. —v.i. to conduct missionary work. —v.t. to conduct missionary work in or among. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mission control mission specialist Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language