Breadcrumb Home > Dictionary > Index L Leo I: Meaning and Definition of Find definitions for: Le•o I Pronunciation: (lē'ōIt.le'ô), [key] — Saint, (“Leo the Great”), a.d. c390–461, Italian ecclesiastic: pope 440–461. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Leo Leo II TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language