Involutional melancholia or involutional depression is a traditional name for a psychiatric disorder affecting mainly elderly or late middle-aged people, usually accompanied with paranoia. It is classically defined as `depression of gradual onset occurring during the involutional years (40-55 in women and 50-65 in men), with symptoms of marked an....
A depressive disorder of middle life, commonly associated with the climacteric. ... (05 Mar 2000) ... 
Type: Term Definitions: 1. a depressive disorder of middle life, commonly associated with the climacteric.
(formerly) extreme depression related to menopause or, less frequently, the male climacteric.