/ Dictionary / Index P plenipotent: Meaning and Definition of Find definitions for: ple•nip•o•tent Pronunciation: (plu-nip'u-tunt), [key] — adj. invested with or possessing full power. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plench plenipotentiary 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