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all-wheel drive

noun
  1. a system used in motor vehicles in which all four (or more) wheels are permanently connected to the source of power, in such a way that each wheel is able to rotate at a different speedSee also four-wheel drive
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012