Beltway (noun)

1. A highway that circles a city and connects to the major roads leading in and out of the city.
2. Metonym for the political and media establishment in Washington, D.C.
3. A metaphorical term used to describe a situation or scenario that is self-contained and separate from the outside world.

Origin:

The term was first used to describe the capital beltway, a highway that circles the city of washington, d.c. it has since been used to describe similar highways that circle other cities.

Examples:

1. The beltway was a crucial route for those who needed to get in and out of the city quickly.
2. The politicians and media figures on the beltway often had little connection to the rest of the country.
3. The beltway was a self-contained world, where the political and media establishments operated with little interference from the outside world.
4. Driving on the beltway was often a frustrating experience, due to the heavy traffic and long delays.
5. The term beltway was used to describe a situation where the decision makers were isolated from the rest of the world.