/ Dictionary / Index P perspicacious: Meaning and Definition of Find definitions for: per•spi•ca•cious Pronunciation: (pûr"spi-kā'shus), [key] — adj. having keen mental perception and understanding; discerning: to exhibit perspicacious judgment. having keen vision. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: perspicacious (Thesaurus) perspectivism perspicacity Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language