Tristan da Cunha
geographical name
Tris·tan da Cu·nha
| \ ˌtri-stən-də-ˈkü-nə
, -nyə\
, -nyə\
Definition of Tristan da Cunha
island in the South Atlantic area 38 square miles (98 square kilometers), population 274
Note: Tristan da Cunha is the chief island of the Tristan da Cunha group, which is attached to the British colony of Saint Helena. It was the site of volcanic eruptions in 1961.