from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. An ancient Chinese fortification, almost 4,000 miles long, originally designed to protect China from the Mongols.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a fortification 1,500 miles long built across northern China in the 3rd century BC; it averages 6 meters in width
Sorry, no etymologies found.
It has since become one of the legends of spaceflight that there are only two man-made objects on Earth that can be seen from outer space—the Great Wall of China and the gigantic Fort Peck Dam in Montana.