Great' Wall' of Chi'na
a system of fortified walls with a roadway along the top, constructed as a defense for China against the nomads of the regions that are now Mongolia and Manchuria: completed in the 3rd century b.c., but later repeatedly modified and rebuilt. 2000 mi. (3220 km) long. Also called Chinese Wall.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.