— Uruguayan /yoor'euh gway"euhn, -gwuy"euhn/ , adj. , n.
/yoor"euh gway', -gwuy'/ ; Sp. /ooh'rddooh gwuy"/ , n.
1. a republic in SE South America. 3,261,707; 72,172 sq. mi. (186,925 sq. km). Cap.: Montevideo.
2. a river in SE South America, flowing from S Brazil along the boundary of E Argentina into the Río de la Plata. 981 mi. (1580 km) long.