n. 1 a passage from which doors lead into rooms (orig. an outside passage connecting parts of a building, now usu. a main passage in a large building). 2 a passage in a railway carriage from which doors lead into compartments. 3 a strip of the territory of one State passing through that of another, esp. securing access to the sea. 4 a route to which aircraft are restricted, esp. over a foreign country. corridors of power places where covert influence is said to be exerted in government.
[ F f. It. corridore corridor for corridojo running-place f. correre run, by confusion with corridore runner ]