A river in Southwest Asia flowing 1,150 miles east-southeast from the Armenian Highland in Turkey through Iraq. It forms the eastern edge of classical Mesopotamia. It unites with the Euphrates River to form the Shatt al-Arab before flowing into the Persian Gulf.

(historical) The capital of the Seleucid Empire, and a major city in Parthian and Sasanian periods

(historical) Synonym of Seleucia-on-Tigris

(figuratively, poetic, rare) Of or pertaining to tigers; tigerish

Alternative form of tigerishly