[ree-aw th e lah] /ˈri ɔ ðɛ lɑ/ (Show IPA) an estuary on the SE coast of South America between Argentina and Uruguay, formed by the Uruguay and Paraná rivers, about 185 miles (290 km) long.
Río de la Plata (ˈrio de la). an estuary on the SE coast of South America, between Argentina and Uruguay, formed by the Uruguay and Paraná Rivers. Length: 275 km (171 miles). Width: (at its mouth) 225 km (140 miles) Also known as La Plata English name River Plate
La Plata
/Spanish la ˈplata/
noun
1.
a port in E Argentina, near the Río de la Plata estuary: founded in 1882 and modelled on Washington DC; university (1897). Pop: 758 000 (2005 est)