four wheel drive

four-wheel drive

noun Automotive.
1.
a drive system in which engine power is transmitted to all four wheels for improved traction.
2.
a vehicle having such a system. Abbreviation: 4WD

Origin:
1925–30

four-wheel-drive, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
four-wheel drive
 
n
a system used in motor vehicles in which all four wheels are connected to the source of power

Collins English Dictionary - Complete & Unabridged 10th Edition
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