Zagros Mountains Syllabification: (Zag·ros Moun·tains)Pronunciation: /ˈzagrəs, -ˌrōs/Definition of Zagros Mountains a mountain range in western Iran that rises to 14,921 feet (4,548 m) at Zard Kuh. Most of Iran’s oil fields lie along the western foothills. Zagros Mountains in other Oxford dictionaries Definition of Zagros Mountains in the British & World English dictionary