a river in SE Iraq, formed by the confluence of the Tigris and Euphrates Rivers: flows southeast as part of the border between Iraq and Iran to the Persian Gulf. Length: 193 km (120 miles)
Shatt-al-Arab in American English
(ˌʃætɑlˈɑrɑb)
river in SE Iraq, formed by the confluence of the Tigris & Euphrates rivers & flowingsoutheast into the Persian Gulf: 120 mi (193 km)