/ Dictionary / Index L Leo XIII: Meaning and Definition of Find definitions for: Leo XIII Pronunciation: [key] — (Giovanni Vincenzo Pecci), 1810–1903, Italian ecclesiastic: pope 1878–1903. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Leo XII Leofric Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language