/ Dictionary / Index P Piarist: Meaning and Definition of Find definitions for: Pi•a•rist Pronunciation: (pī'ur-ist), [key] — n. a member of a Roman Catholic teaching congregation founded in Rome in 1597. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. piano wire pias. Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language