Shatt al-Arab Syllabification: (Shatt al-A·rab)Pronunciation: /ˌSHat al ˈarəb, SHät äl ˈärəb/Definition of Shatt al-Arab a river in southwestern Asia that is formed by the confluence of the Tigris and Euphrates rivers and flows 120 miles (195 km) through southeastern Iraq to the Persian Gulf. Its lower course forms the border between Iraq and Iran. Origin:from Arabic, literally 'Arab shore'Shatt al-Arab in other Oxford dictionaries Definition of Shatt al-Arab in the British & World English dictionary