river in EC Siberian Russia, rising near Lake Baikal and flowing northeast into the Laptev Sea: c. 2,734 mi (4,400 km)
See Lena in American Heritage Dictionary 4
A river of eastern Russia rising near Lake Baikal and flowing about 4,296 km (2,670 mi) northeast and north to the Laptev Sea. Its delta is some 402 km (250 mi) wide.