a city in W central Russia, on the River Volga: an important river port, terminal of the Mariinsk Waterway (between Saint Petersburg and the Volga) at the SE end of the Rybinsk Reservoir (area: 4700 sq km (1800 sq miles)). Pop: 218 000 (2005 est) Former names (from the Revolution until 1957) Shcherbakov, (1984–91) Andropov