A pair of patent leather shoes.
patent leather definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
leather with a hard, glossy, usually black finish: made by a process formerly patented
patent leather definition by American Heritage Dictionary
Black leather finished to a hard glossy surface and used especially for shoes and clothing accessories.
Origin: So called because it is made by a once-patented process.