/ Dictionary / Index M minister plenipotentiary: Meaning and Definition of Find definitions for: min'ister plenipoten'tiary Pronunciation: [key] plenipotentiary. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ministerium minister resident Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language