Definition of "interstate highway" [interstate highway]

• One of the system of highways linking major cities in the 48 contiguous states of the United States (noun)

WordNet. Princeton University. 2010.

• "The 1956 Federal-Aid Highway Act, which funded the interstate highway system, opened up outlying rural areas to urbanization."
• "The Hoover Dam, the Tennessee Valley Authority, the interstate highway system, the Internet, the Human Genome Project-time and again, government investment has helped pave the way for an explosion of private economic activity."