1. no longer functioning properly, divide something into smaller parts or analyse it
Professional
Social
a nervous breakdown, a breakdown in communication, breakdown the facts
A 'breakdown' refers to a situation where something is failing or starting to fail. When a machine or vehicle stops working it is also called a 'breakdown'. A severe deterioration in someone's mental health is also a 'breakdown'. A 'breakdown' may also be the way information is divided or arranged in different groups.