TAVIRA, or TAVILA, a considerable town of Portugal, and capital of the province of Algarve, with a handsome castle, and one of the best harbours in the kingdom, defended by a fort. It is seated in a fertile country, at the mouth of the river Gilaon, between Cape Vincent and the strait of Gibraltar, 100 miles west-by-north of Cadiz. W. Long. 7. 46. N. Lat. 37. 18.