Definition of roadrunner
: a largely terrestrial bird (Geococcyx californianus) of the cuckoo family that has a long tail and a crest, is a speedy runner, and inhabits arid regions from the southwestern U.S. to Mexico
also
: a closely related bird (G. velox) of Mexico and Central America
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Merriam-Webster unabridged
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Time Traveler for roadrunner
The first known use of roadrunner was in 1856
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