Definition of Rocky Mountains in US English:

Rocky Mountains

(also the Rockies)

proper noun

  • The chief mountain system in North America. It extends from the US–Mexico border to the Yukon Territory of northern Canada. It separates the Great Plains from the Pacific coast and forms the Continental Divide. Several peaks rise to more than 14,000 feet (4,300 m), the highest being Mount Elbert at 14,431 feet (4,399 m).


Rocky Mountains