andes — a major mountain system of South America, extending for about 7250 km (4500 miles) along the entire W coast, with several parallel ranges or cordilleras and many volcanic peaks: rich in minerals, including gold, silver, copper, iron ore, and nitrates. Average height: 3900 m (13 000 ft). Highest peak: Aconcagua, 6960 m (22 835 ft)
