river flowing from EC Turkey through Iraq, joining the Euphrates to form the Shatt-al-Arab: 1,150 mi (1,851 km)
See Tigris in American Heritage Dictionary 4
(tīˈgrĭs)
A river of southwest Asia rising in eastern Turkey and flowing about 1,850 km (1,150 mi) southeast through Iraq to the Euphrates River. It was a major transportation route in ancient times.