river flowing from the Himalayas of SW Tibet through Assam (India) & Bangladesh, where it joins the Ganges to form a vast delta at the head of the Bay of Bengal: c. 1,800 mi (2,897 km)
See Brahmaputra in American Heritage Dictionary 4
(bräˌmə-po͞oˈtrə)
A river of southern Asia rising in the Himalaya Mountains of southwest Xizang (Tibet) and flowing about 2,896 km (1,800 mi) east then south and west through northeast India to join the Ganges River and form a vast delta in central Bangladesh.