Definition of corridors:
(n) :
A narrow hall or passage with rooms leading off it, as in a building or in a railway carriage.
(n) :
A restricted tract of land that allows passage between two places.
(n) :
Airspace restricted for the passage of aircraft.
(n) :
The land near an important road, river, railway line.
(n) :
(military, historical, rare) The covered way lying round the whole compass of the fortifications of a place.