A four-wheel drive is a vehicle in which all four wheels receive power from the engine to help with steering. This makes the vehicle easier to drive on rough roads or surfaces such as sand or snow. An automotive drive system in which mechanical power is transmitted from the drive shaft to all four wheels. a system in a vehicle which gives the power of the engine to all four wheels to make it easier to drive, or a vehicle that has this type of system
(Otomotiv) A gearing system that allows all four wheels to be drive wheels rather than just the front 2 or rear 2. Four-wheel drive gives better traction than 2 wheel drive, but should be used only when needed because it doesn't work efficiently under normal road conditions