Corridor /(k?r"r?-d?r [or] -d?r)/

Cor·ri·dor

Corridor

n.
  1. A gallery or passageway leading to several apartments of a house. (Arch.)
  2. The covered way lying round the whole compass of the fortifications of a place. (Fort.) [R.]
  3. any relatively narrow passageway or route, such as a strip of land through a foreign territory.
  4. a densely populated stretch of land; as, the Northeast corridor, extending from Richmond, Virginia into Maine.