Definition of jackknife noun from the Oxford Advanced American Dictionary

 

jackknife

 noun
noun
NAmE//ˈdʒæknaɪf//
 
(pl. jackknives
NAmE//ˈdʒæknaɪvz//
 
)
 
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a large knife with a folding blade
See the Oxford Advanced Learner's Dictionary entry: jackknife

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