n1. (Architecture) a hallway or passage connecting parts of a building
2. (Physical Geography) a strip of land or airspace along the route of a road or river: the M1 corridor.
3. (Physical Geography) a strip of land or airspace that affords access, either from a landlocked country to the sea (such as the Polish corridor, 1919-39, which divided Germany) or from a state to an exclave (such as the Berlin corridor, 1945–90, which passed through the former East Germany)
4. (Railways) a passageway connecting the compartments of a railway coach
5. (Government, Politics & Diplomacy) corridors of power the higher echelons of government, the Civil Service, etc, considered as the location of power and influence
6. (Aeronautics) a flight path that affords safe access for intruding aircraft
7. (Astronautics) the path that a spacecraft must follow when re-entering the atmosphere, above which lift is insufficient and below which heating effects are excessive