TUCUMAN, a province of South America, in Paraguay; bounded on the north by the provinces of Los-Chicas and Chaco; on the east by Chaco and Rio-de-la-Plata, on the south by the country of Chiquitos and Pampas, and on the west by the bishopric of St Jago. The air is hot, and the earth sandy: however, some places are fruitful enough, and the original natives have a good character. The Spaniards possess a great part of this country.