/ Dictionary / Index P pias.: Meaning and Definition of Find definitions for: pias. Pronunciation: [key] piaster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pias (Thesaurus) Piarist piassava 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