Labyrinth: From the Greek labyrinthos, "a maze of intricate passages"; especially, a subterranean structure having many intricate passages. Several such mazes were famous in antiquity. The greatest was that which lay near Lake Moeris, in the Fayum, Egypt, and was probably built by Amenernhat III about 2300 B.C. According to Herodotus, it had 3,000 halls and chambers, half of them above ground and half below, and twelve covered courts.