Jo·han·nes·burg 
(jō-hănĭs-bûrg′, -hänĭs-)
(jō-hănĭs-bûrg′, -hänĭs-) The largest city of South Africa, in the northeast part of the country northwest of Durban. Founded in 1886 after the discovery of gold nearby, it is a major industrial center.