a river in E Asia, forming most of the boundary between N Manchuria and the SE Russian Federation, flowing into the Sea of Okhotsk. ab. 2700 mi. (4350 km) long.
A·mur River (ä-mŏŏr') A river of northeast Asia flowing about 2,896 km (1,800 mi) mainly along the border between China and Russia. One of the chief waterways of Asia, it drains into Tatar Strait opposite Sakhalin Island.