interstate

If something is interstate, it happens between different U.S. states. For example, you can drive on Interstate 80 from downtown San Francisco, California to Teaneck, New Jersey. Yep, that's a trip.

If you're driving from Rhode Island to Illinois, you can call it interstate travel, or an interstate road trip — you're going from state to state. An interstate highway connects different states together, like I-95, which is an east coast interstate highway that stretches from Maine to Florida. For short, you can call a road like this an interstate. This 20th century word combines inter-, "between," and state.

Definitions of interstate
1

adj involving and relating to the mutual relations of states especially of the United States

Interstate Highway Commission”
interstate highways”
Interstate Commerce Commission”
interstate commerce”
Antonyms:
intrastate
relating to or existing within the boundaries of a state

n one of the system of highways linking major cities in the 48 contiguous states of the United States

Synonyms:
interstate highway
Type of:
highway, main road
a major road for any form of motor transport

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