/ Dictionary / Index P plenipotentiary: Meaning and Definition of Find definitions for: plen•i•po•ten•ti•ar•y Pronunciation: (plen"u-pu-ten'shē-er"ē, -shu-rē), [key] — n., pl. adj. -ar•ies, —n. a person, esp. a diplomatic agent, invested with full power or authority to transact business on behalf of another. —adj. invested with full power or authority, as a diplomatic agent. conferring or bestowing full power, as a commission. absolute or full, as power. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plenipotentiary (Thesaurus) plenipotent plenish 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