[ adjective in-ter-steyt; noun in-ter-steyt ]
See synonyms for: interstateinterstates on

  1. connecting or involving different states: interstate commerce.

  1. a highway serving two or more states.

  2. (sometimes initial capital letter) a highway that is part of the nationwide U.S. Interstate Highway System.

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Origin of interstate

An Americanism dating back to 1835–45; inter- + state

Other words from interstate

  • non·in·ter·state, adjective

Words that may be confused with interstate

Words Nearby interstate Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use interstate in a sentence

British Dictionary definitions for interstate


/ (ˈɪntəˌsteɪt) /

  1. between or involving two or more of the states of the US, Australia, etc

  1. Australian to or into another state

  1. US a motorway crossing between states

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012