/ Dictionary / Index M Mongol Empire: Meaning and Definition of Find definitions for: Mon'gol Em'pire Pronunciation: [key] an empire founded in the 12th century by Genghis Khan, which reached its greatest territorial extent in the 13th century, encompassing the larger part of Asia and extending westward to the Dnieper River in eastern Europe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mongol Mongolia Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language