The capital of Bulgaria; population 1,162,898 (2008). An ancient Thracian settlement, it became a province of Rome in the first century AD. It was held by the Turks between the late 14th and late 19th centuries and became the capital of Bulgaria in 1879.
Definition of Sofia in US English:
Sofia
proper nounˈsōfēəˈsoʊfiə
The capital of Bulgaria, in the western part of the country; population 1,162,898 (2008).