middle age noun 1middle-age adjective 1 noun1 •The period of life directly preceding old age, often defined roughly as ages 45–65; midlife.The sequel checks in with the unmoored but largely lovable characters from the first movie as they face middle age. — 2017 middle-age adjective[before a noun]1 •Attributive form of Middle Ages.With the same precaution that they would have consorted with the evil spirits of middle-age romance. — 1840
