JACKKNIFE Meaning of JACKKNIFE in English jack|knife noun, verb BrE AmE ˈdʒæk |naɪf▷ jack|knifed naɪft▷ jack|knifes naɪfs▷ jack|knifing naɪf ɪŋ Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012