Definitions of driver:

noun: a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee
noun: (computer science) a program that determines how a computer will communicate with a peripheral device
noun: the operator of a motor vehicle
noun: a golfer who hits the golf ball with a driver
noun: someone who drives animals that pull a vehicle
name: A surname (common: 1 in 16666 families; popularity rank in the U.S.: #1985)