| Noun | 1. | St. Thomas and Principe - island nation in the South Atlantic off the West coast of Africa; achieved independence from Portugal in 1975; has enormous offshore oil reservescountry, land, state - the territory occupied by a nation; "he returned to the land of his birth"; "he visited several European countries" Sao Tome - capital of Sao Tome and Principe Principe - an island in the Gulf of Guinea that is part of Sao Tome and Principe Atlantic, Atlantic Ocean - the 2nd largest ocean; separates North and South America on the west from Europe and Africa on the east | |