A German autobahn.
autobahn 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.
autobahn definition by American Heritage Dictionary
An expressway in Germany and German-speaking countries.
Origin: German : Auto, automobile; see auto + Bahn, road, from Middle High German ban; see gwhen- in Indo-European roots.