Definition of "malfunction"

malfunction

/ˌmælˈfʌŋk.ʃən/

noun
plural malfunctions
1. Faulty functioning.
2. Failure to function.
verb
third-person singular simple present malfunctions, present participle malfunctioning, simple past and past participle malfunctioned
1. To function improperly.
2. To fail to function.