concrete canyon

Noun

 * 1) A space or street surrounded by skyscrapers.
 * 2) * 2001-05, William P. Hammond, 9/11 tribute poem at ipsna.com:
 * Concrete Canyons are but now spacious sky,
 * Her children weep for the parents who died.
 * 1) A narrow street circuit surrounded by concrete walls.
 * 1) A narrow street circuit surrounded by concrete walls.