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driver

driver /ˈdraɪvɚ/ noun
plural drivers
driver
/ˈdraɪvɚ/
noun
plural drivers
Britannica Dictionary definition of DRIVER
[count]
: a person who drives a car, truck, etc.
see also backseat driver
: a person whose job is to drive a vehicle (such as a taxi, truck, or bus)
technical : a piece of computer software that controls a device (such as a mouse or printer) that is attached to the computer
golf : a club that is used for hitting long shots off a tee

in the driver's seat

: in a position in which you are able to control what happens
see also pile driver