midlife crisis

noun

1. a period of psychological stress occurring in middle age, thought to be triggered by a physical, occupational, or domestic event, as menopause, diminution of physical prowess, job loss, or departure of children from the home.

noun

1. a crisis that may be experienced in middle age involving frustration, panic, and feelings of pointlessness, sometimes resulting in radical and often ill-advised changes of lifestyle

n.

1. A period of psychological doubt and anxiety that some people experience in middle age.