- middle age - the time of life between youth and old age (e.g., between 40 and 60 years of age)
--1 is a kind of historic period, age; time of life; historic period, age; time of life
--1 is a part of
--1 has parts: menopause, climacteric, change of life; climacterichistory; 1 sense of middle age ; middle age; adulthood, maturity; Middle Ages, Dark Ages; history; 1 sense of middle age ; middle age; adulthood, maturity