Screw·driv·er, Screw-driv·er n. A tool for turning screws so as to drive them into their place. It has a thin end which enters the nick in the head of the screw.
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  screwdriver
       n 1: a hand tool for driving screws; has a tip that fits into the
            head of a screw
       2: a cocktail made with vodka and orange juice