the operator of a motor vehicle
"The driver checked his mirrors before merging onto the highway."
someone who drives animals that pull a vehicle
"The old driver whistled to his team of oxen as they pulled the heavy cart up the muddy hill."
a golfer who hits the golf ball with a driver
"After warming up on the driving range, Sarah felt confident enough to tee off with her driver on the first hole."
(computer science) a program that determines how a computer will communicate with a peripheral device
"The technician had to update the printer driver because the new model wasn't recognized by the operating system."
a golf club (a wood) with a near vertical face that is used for hitting long shots from the tee
"After lining up his stance on the first hole, he swung the driver to send the ball soaring down the fairway."
One who drives something, in any sense of the verb to drive.
"The car driver merged onto the highway just as the rain began to fall."
In plain English: A driver is someone who operates a vehicle like a car or truck.
"The driver helped me load my groceries into the back seat."
Usage: A driver is anyone or anything that propels a vehicle forward, such as a human operating a car or an engine powering a machine. Use this term whenever referring to the agent responsible for moving a conveyance, whether by manual control or mechanical force.
A surname.
"The Driver family has lived in this neighborhood for three generations."
The word driver comes from Middle English, formed by adding the suffix -er to drive. It originally referred to someone or something that drives, a meaning it has retained into modern English.