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English definition of “malfunction”

malfunction

noun [C]     /ˌmælˈfʌŋk.ʃən/ formal
a failure to work or operate correctly: Shortly before the crash the pilot had reported a malfunction of the aircraft's navigation system.Faults and mistakesNot functioning
(Definition of malfunction noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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