Ural Mountains Syllabification: (U·ral Moun·tains)Pronunciation: /ˈyo͝orəl/ (also the Urals)Definition of Ural Mountains a mountain range in Russia that extends 1,000 miles (1,600 km) from the Arctic Ocean to the Aral Sea. It forms part of the conventional boundary between Europe and Asia. Ural Mountains in other Oxford dictionaries Definition of Ural Mountains in the British & World English dictionary