/ Dictionary / Index P plenary: Meaning and Definition of Find definitions for: ple•na•ry Pronunciation: (plē'nu-rē, plen'u-), [key] — adj., n., pl. -ries. —adj. full; complete; entire; absolute; unqualified: plenary powers. attended by all qualified members; fully constituted: a plenary session of Congress. —n. a plenary session, meeting, or the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plenary (Thesaurus) Plekhanov plenary indulgence 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