发音：[？nt？rste？t]作形容词，意为：州际的;州与州之间的作名词，意为：州际公路例如：We have roadblocks on every interstate.我们在每个州际间都设了路障。这里的interstate作形容词表示州际间的。

His tracks were as straight as the interstate.他的踪迹和州际公路一样直。

这里的interstate作名词表示州际公路。