the chief mountain system of W North America, extending from British Columbia to New Mexico: forms the Continental Divide. Highest peak: Mount Elbert, 4401 m (14 439 ft). Denali (6190 m (20 308 ft)), in the Alaska Range, is not strictly part of the Rocky Mountains
Rocky Mountains in American English
mountain system in W North America, extending from central N.Mex. to N Alas.: over3,000 mi (4,828 km) long; highest peak, Mt. McKinley