mountain pass in a range of the Hindu Kush, between Afghanistan & Pakistan: c. 33 mi (53 km) long
See Khyber Pass in American Heritage Dictionary 4
A narrow pass, about 53 km (33 mi) long, through mountains on the border between eastern Afghanistan and northern Pakistan. It has long been a strategic trade and invasion route. The highest point of the pass is about 1,068 m (3,500 ft).