Belgaum (bĕlgoumˈ) [key], city (1991 pop. 402,412), Karnataka state, SE India. It is an educational and district administrative center that trades in food grains, sugarcane, cotton, tobacco, oilseed, and milk products. Industries include leather, clay, pottery, soap, cotton, and precious metals. Belgaum also has a military cantonment, and there is an airport in nearby Sambre.