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English definition of “break down”

break down

phrasal verb with break     /breɪk/ verb (past tense broke, past participle broken)
MACHINE B1 If a machine or vehicle breaks down, it stops working: My car broke down on the way to work.Not functioning
COMMUNICATION If a system, relationship, or discussion breaks down, it fails because there is a problem or disagreement: Their marriage broke down after only two years.Causing something to endComing to an endFailing and doing badlyEnding relationships and divorce
CRY to become very upset and start cryingWeeping and cryingFeeling sad and unhappy
(Definition of break down from the Cambridge Learner's Dictionary © Cambridge University Press)

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