- River, southeastern South America.Rising in southern Brazil, it forms the border between Argentina and Brazil and between Argentina and Uraguay. Above Buenos Aires, it combines with the Paraná River to form the great estuary of the Río de la Plata. Its 990-mi (1,593-km) course is interrupted by rapids, but it is navigable by ocean vessels for about 130 mi (210 km) upriver from its mouth.
* * *Portuguese Rio Uruguai, Spanish Río Uruguay,river in southern South America that rises in the coastal range of southern Brazil. Its chief headstream, the Pelotas River, rises just 40 miles (64 km) from the Atlantic coast at Alto do Bispo in Santa Catarina state, Brazil, and takes the name Uruguay after it is joined by the Canoas River near Piratuba. Flowing west through the coastal range of Brazil (separating Santa Catarina and Rio Grande do Sul states), it then turns southwestward, forming the Argentina–Brazil border. Below Monte Caseros, Arg., it turns southward, forming the border between Argentina and Uruguay until, above Buenos Aires, it combines with the Paraná River to form the great estuary of the Río de la Plata. Its 990-mile (1,593-kilometre) course is interrupted by rapids between Salto (Uruguay) and the influx of the Quaraí River (Spanish: Río Guareim) near Monte Caseros; hence its importance as a waterway is less than that of the Paraguay–Paraná river system. Ocean vessels can reach Paysandú, Uruguay, about 130 miles (210 km) from the mouth; smaller ships can proceed to Salto, 60 miles (100 km) farther upstream.
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Uruguay River — The Uruguay River (in Spanish, Río Uruguay , pronounced|uɾuˈɣwaj; in Portuguese, Rio Uruguai , IPA| [uɾuˈgwaj] ) is a river in South America. It flows from north to south and makes boundary with Brazil, Argentina and Uruguay, separating some of… … Wikipedia
Uruguay River — river, SE South America; 1,000 mi. long … Webster's Gazetteer
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river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… … Universalium