Burgas (bŏrgäsˈ) [key], city (1993 pop. 198,439), SE Bulgaria, on the Black Sea. It rivals Varna as the chief export port of Bulgaria and is an important commercial center. Food processing is the chief industry in Burgas, which also has engineering works and an oil refinery. The city was founded (18th cent.) on the site of a 14th-century fortified town.