From Longman Dictionary of Contemporary Englishinterstatein‧ter‧state1 /ˈɪntəsteɪt $ -tər-/ noun [countable] American English TTRa wide road that goes between states, on which cars can travel very fast → freeway
Examples from the Corpus
interstate• Like most interstates, it was an odd bit of space, a nar-row slot fenced by high trees.• Now the camper-carried egg masses from the West will be passing camper-carried egg masses frorn the East on the interstates.• On holidays and weekends, the interstates grow thick with campers from Florida, truckers from Vermont, and Bay State skiers.interstateinterstate2 adjective [only before noun] PTTinvolving different states, especially in the US interstate commerceExamples from the Corpus
interstate• States may regulate local incidents of interstate commerce when Congress has not occupied the field. 23.• Hey Matt, old pal, old buddy, this stuff got stolen from us, it was moving, interstate commerce.• It was an interstate highway, up on stilts, that flew over the houses and through the burning air.• Upstairs alone, Petey could fling open everything and build an interstate highway.• In 1961, the New Abolitionists focused their attention on segregation in interstate transportation, particularly on passenger buses.From Longman Business Dictionaryinterstatein‧ter‧state /ˌɪntəˈsteɪt◂-tər-/ adjective [only before a noun] involving more than one state, especially in the USefforts to limit interstate shipments of industrial wasteinterstate banking (=when a bank has activities in more than one state) → compare intrastate 