breakdown /ˈbreɪkdaʊn/ noun [C]
ILLNESS (also nervous breakdown) › a short period of mental illness when people are too ill to continue with their normal lives: to have a breakdown
FAILURE › when something such as communication or a relationship fails or ends: a breakdown in the peace talks
EXPLANATION › a short explanation of the details of something: I need a breakdown of the costs involved.
NOT WORKING › when a vehicle or machine stops working for a period of time