driver

[drahy-ver]
noun
1.
a person or thing that drives.
2.
a person who drives a vehicle; coachman, chauffeur, etc.
3.
a person who drives an animal or animals, as a drover or cowboy.
4.
Also called number one wood. Golf. a club with a wooden head whose face has almost no slope, for hitting long, low drives from the tee.
5.
Machinery.
a.
a part that transmits force or motion.
b.
the member of a pair of connected pulleys, gears, etc., that is nearer to the power source.
6.
Computers. software or hardware that controls the interface between a computer and a peripheral device.
7.
Railroads. driving wheel ( def 2 ).
8.
British. a locomotive engineer.
9.
Audio.
a.
the part of a loudspeaker that transforms the electrical signal into sound.
b.
the entire loudspeaker.
10.
Nautical.
a.
a jib-headed spanker sail.
b.
a designation given to one of the masts abaft the mizzen on a sailing vessel having more than three masts, either the fifth or sixth from forward. Compare pusher ( def 4 ), spanker ( def 1b ).

Origin:
1350–1400; Middle English drivere. See drive, -er1

driverless, adjective
nondriver, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
driver (ˈdraɪvə)
 
n
1.  a person who drives a vehicle
2.  in the driver's seat in a position of control
3.  a person who drives animals
4.  a mechanical component that exerts a force on another to produce motion
5.  golf a club, a No. 1 wood, with a large head and deep face for tee shots
6.  electronics a circuit whose output provides the input of another circuit
7.  computing a computer program that controls a device
8.  something that creates and fuels activity, or gives force or impetus
 
'driverless
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

driver
"one who drives" in various senses, c.1400; from drive. Slavery sense is attested by 1796. Driver's seat is attested by 1867; figurative use by 1954.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

driver definition


1. device driver.
2. The main loop of an event-processing program; the code that gets commands and dispatches them for execution.
3. In the TeX world and the computerised typesetting world in general, a program that translates some device-independent or other common format to something a real device can actually understand.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Idioms & Phrases

driver

see backseat driver; in the driver's seat.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
Driver and vehicle information, consumer protection, elections department.
The vehicle had been there for two days, as its driver was staying at the hotel.
Construction will be another strong economic driver, especially as
  hydroelectric dam and road projects gain steam.
On one occasion he had a fight with a drunken and reckless driver who was
  urging to top speed a spirited horse.
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