auto racing

noun
the sport of racing automobiles in which drivers compete against each other on a course designed for racing or on closed public roads.

Origin:
probably earlier than 1965–70

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Auto racing is divided based on vehicle modifications.
Her hobbies include auto racing and sumo wrestling.
In the ruthless world of auto racing, aerodynamics can make the difference
  between stunning victory and fiery oblivion.
Oh, how far the engine-whining, exhaust-fume-infused world of auto racing has
  come on the road to being green.
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