An Asian river between China and Russia; flows into the Sea of Okhotsk; Also called: Amur River.
River in E Asia. Formed by the Argun and Shilka rivers, the Amur enters the Sea of Okhotsk. At its mouth at Nikolevsk it is 16 km/10 mi wide. For much of its course of over 4,400 km/2,730 mi it forms, together with its tributary, the Ussuri, the boundary between Russia and China.