/ Dictionary / Index M middlescence: Meaning and Definition of Find definitions for: mid•dl•es•cence Pronunciation: (mid"l-es'uns), [key] — n. the middle-age period of life, esp. when considered a difficult time of self-doubt and readjustment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Middlesbrough middle school 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