Definition of interstate
(Entry 1 of 2)
: of, connecting, or existing between two or more states especially of the U.S.
interstate commerce
interstate
nounDefinition of interstate (Entry 2 of 2)
: any of a system of expressways connecting most major U.S. cities
— called also interstate highway
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Time Traveler for interstate
The first known use of interstate was in 1844
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