1. country in southeastern South America, south of Brazil, bordering the Atlantic Ocean. Languages: Spanish. Currency: Uruguayan peso. Capital: Montevideo. Population: 3,494,382 (2009 estimate).
Area: 176,215 sq km (68,037 sq mi) Official name Oriental Republic of Uruguay
2. river in SE South America: river in southeastern South America, rising in southern Brazil and entering the Atlantic Ocean through the Río de la Plata. Length: 1,600 km (990 mi)
