A screwdriver is a tool that is used for turning screws. It consists of a metal rod with a flat or cross-shaped end that fits into the top of the screw.
screwdriver in British English
(ˈskruːˌdraɪvə)
noun
1.
a tool used for turning screws, usually having a handle of wood, plastic, etc, and a steel shank with a flattened square-cut tip that fits into a slot in the head of the screw
2.
an alcoholic beverage consisting of orange juice and vodka
screwdriver in American English
(ˈskruˌdraɪvər)
noun
1.
a tool used for turning screws, having an end that fits into the slot in the headof the screw