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. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: pernicious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language