/ Dictionary / Index P Pius XII: Meaning and Definition of Find definitions for: Pius XII Pronunciation: [key] (Eugenio Pacelli) 1876–1958, Italian ecclesiastic: pope 1939–58. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pius XI Piute 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