/ Dictionary / Index M midlife: Meaning and Definition of Find definitions for: mid•life Pronunciation: (n.mid'līf'adj.mid'līf&sec), [key] — n. See —adj. middle-aged. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mid-level midlife crisis Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language