Meaning & use

interstate

adjective·Everyday

Existing, occurring, or carried on between two or more states.

See it in a sentence

Interstate commerce is regulated by federal law rather than by individual states.

We took the interstate highway to cross three states in a single day.

A note on using this word

In American English, "the interstate" is also used as a noun for a numbered highway in the U.S. Interstate Highway System.

Words with a similar meaning

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Words with an opposite meaning

Another way to use it

2. noun

A highway that is part of the U.S. Interstate Highway System, connecting multiple states.

We merged onto the interstate and drove north for nearly six hours.

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