interstate

1 of 2

adjective

in·​ter·​state ˌin-tər-ˈstāt How to pronounce interstate (audio)
Synonyms of interstatenext
: of, connecting, or existing between two or more states especially of the U.S.
interstate commerce

interstate

2 of 2

noun

in·​ter·​state ˈin-tər-ˌstāt How to pronounce interstate (audio)
: any of a system of expressways connecting most major U.S. cities

called also interstate highway

Examples of interstate in a Sentence

Noun You'll get there quicker if you take the interstate.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Immigration enforcement efforts in Oklahoma also have focused heavily on apprehending commercial truckers driving on interstate highways. Nuria Martinez-Keel, Oklahoma Voice, 10 Feb. 2026 CDLs operate under uniform federal standards administered by the Federal Motor Carrier Safety Administration, designed to ensure consistency across state lines and reliability in interstate commerce. Bhupinder Kaur, The Orlando Sentinel, 7 Feb. 2026
Noun
The interstate, which closed in both directions Friday evening, reopened around noon Saturday. Frederick Melo, Twin Cities, 10 Feb. 2026 Long before Connecticut was known for insurance companies and interstates, the Connecticut River Valley was defined by farms. Miriam Schwartz, Hartford Courant, 8 Feb. 2026 See All Example Sentences for interstate

Word History

First Known Use

Adjective

1844, in the meaning defined above

Noun

1968, in the meaning defined above

Time Traveler
The first known use of interstate was in 1844

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Cite this Entry

“Interstate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interstate. Accessed 16 Feb. 2026.

Kids Definition

interstate

1 of 2 adjective
in·​ter·​state ˌint-ər-ˈstāt How to pronounce interstate (audio)
: of, connecting, or existing between states especially of the U.S.
interstate highways

interstate

2 of 2 noun
in·​ter·​state ˈint-ər-ˌstāt How to pronounce interstate (audio)
: an interstate highway

More from Merriam-Webster on interstate

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