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.