/ Dictionary / Index P Pius VIII: Meaning and Definition of Find definitions for: Pius VIII Pronunciation: [key] (Francesco Saverio Castiglioni) 1761–1830, Italian ecclesiastic: pope 1829–30. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pius VII Pius IX Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language