from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chiefly British A superhighway.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A broad highway designed for high speed traffic, having restrictions on the vehicle types permitted and merging lanes instead of cross traffic; in parts of the United States and other places called freeway.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a broad highway designed for high-speed traffic
A calque of German Autobahn. (Wiktionary)