Pock·et·knife n.; pl. -knives  A knife with one or more blades, which fold into the handle so as to admit of being carried in the pocket.
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  knife
       n 1: edge tool used as a cutting instrument; has a pointed blade
            with a sharp edge and a handle
       2: a weapon with a handle and blade with a sharp point
       3: any long thin projection that is transient; "tongues of
          flame licked at the walls"; "rifles exploded quick knives
          of fire into the dark" [syn: tongue]
       v : use a knife on; "The victim was knifed to death" [syn: stab]
       [also: knives (pl)]