jackknifeItalian → EnglishOxford Italian–Englishjackknife /BrE ˈdʒaknʌɪf , AmE ˈdʒækˌnaɪf / I noun (plurale jackknives) 1 (knife) coltello m a serramanico 2 jackknife diveII intransitive verb [lorry] sbandare affiancandosi alla motrice