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English definition of “malfunction”

malfunction

verb [I] uk   /ˌmælˈfʌŋk.ʃən/ formal us  
to fail to work or operate correctly

malfunction

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