corridorn.[F., fr. Itt. corridpore, or Sp. corredor; prop., a runner, hence, a running or long line, a gallery, fr. L. currere to run. See Course.]()1. (Arch.) A gallery or passageway leading to several apartments of a house.()2. (Fort.) The covered way lying round the whole compass of the fortifications of a place.()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.()