a river in NE Asia, rising in N Mongolia as the Argun and flowing southeast, then northeast to the Sea of Okhotsk: forms the boundary between Manchuria and Russia. Length: about 4350 km (2700 miles)
Modern Chinese name: Heilong Jiang
Amur in American English
(ɑˈmʊr)
river in NE Asia, flowing along the Russia-China border across E Siberia into Tatar Strait: c. 1,800 mi (2,897 km); with principal headstreams, 2,744 mi (4,416 km)