Pronunciation: (soun' too-me'; Eng. sou' tu-mā'),[key] 1. an island in the Gulf of Guinea, off the W coast of Gabon, just N of the equator: the larger component of the Democratic Republic of São Tomé and Príncipe. 73,000; 318 sq. mi. (824 sq. km).
2. a city on this island: capital of the republic. 5714.
3. Pi•co dePronunciation: (pē'koo du),[key]the highest mountain on this island, 6640 ft. (2024 m). Also,Sao' To•me',São' Tho•mé'.