the.com/great wall

means A massive fortified wall (or more accurately, series of walls) built across northern China to keep out raiders and mark the edge of empire.

from Not one wall but a patchwork of them, begun piecemeal by rival states in the centuries BCE, then linked and reinforced under later dynasties — most famously the Ming, whose brick-and-stone rebuilding is what most people picture today. The English name is simply descriptive, a straightforward translation of Chinese terms for 'long wall,' applied by Western observers awed by its scale; there's no secret linguistic trick in it, just plain reportage struggling to sound adequate to the thing itself.