Definition of pocketknife noun from the Oxford Advanced American Dictionary

 

pocketknife

 noun
noun
NAmE//ˈpɑkətˌnaɪf//
 
(pl. -knives
NAmE//ˈpɑkətˌnaɪvz//
 
)
(also penknife)
 
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a small knife with one or more blades that fold down into the handle
See the Oxford Advanced Learner's Dictionary entry: pocketknife