/ Dictionary / Index M Middle Ages: Meaning and Definition of Find definitions for: Mid'dle Ag'es Pronunciation: [key] the time in European history between classical antiquity and the Italian Renaissance (from about 500a.d. to about 1350): sometimes restricted to the later part of this period (after 1100) and sometimes extended to 1450 or 1500. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. middle-aged middle-age spread Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language