driver

noun

• One who drives something, in any sense of the verb to drive.
• Something that drives something, in any sense of the verb to drive.
• A person who drives a motorized vehicle such as a car or a bus.
• A person who drives some other vehicle.
• A program that acts as an interface between an application and hardware, written specifically for the device it controls.
• A golf club used to drive the ball a great distance.
• A kind of sail, smaller than a fore and aft spanker on a square-rigged ship, a driver is tied to the same spars.
• A mallet.
• A tamping iron.
• A cooper's hammer for driving on barrel hoops.
• A screwdriver.