BujumburaPronunciation: /ˌbuːdʒəmˈbʊərə/Definition of Bujumbura the capital of Burundi, at the north-eastern end of Lake Tanganyika; population 429,000 (est. 2007). It was known as Usumbura until 1962. Bujumbura in other Oxford dictionaries Definition of Bujumbura in the US English dictionary