/ Dictionary / Index L Leo IX: Meaning and Definition of Find definitions for: Leo IX Pronunciation: [key] (Bruno), 1002–54, German ecclesiastic: pope 1049–54. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Leo VIII Leo X 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