I. “+ adjective
also in·ter·statal “+
Etymology: inter- + state or statal
: relating to the mutual relations of states : existing between or including different states — used especially of the states of the United States and of the states of Australia
interstate commerce
interstate highway
II. ˈintə(r)ˌˌ noun
Usage: often capitalized
Etymology: interstate , adjective
: any of a system of expressways connecting most major United States cities