Definition of big rig
US
: a large truck with an attached trailer that is used for hauling freight : semitrailer Five blocks of loading docks are packed with big rigs wheel to wheel, and through the night, buyers haggle … as forklifts tote tons of fruit and vegetables in and out of the warehouses.— Jane and Michael Stern, Gourmet, September 2000 … your windshield has been broken at least once, by one of the rocks flying out from under the big rigs.— Nancy Gibbs, Time, 11 June 2001
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Time Traveler for big rig
The first known use of big rig was in 1946
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