a river in the S central US, rising in the Ouachita Mountains and flowing east, south, and southeast into the Red River in E Louisiana. Length: 974 km (605 miles)
Ouachita in American English
(ˈwɑʃɪtɔ; ˈwɔʃɪtɔ)
river flowing from W Ark. southeast & south into the Red River in La.: 605 mi (974 km)