/wosh"i taw', waw"shi-/ , n. , pl. Ouachitas , ( esp. collectively ) Ouachita for 2.
1. a river flowing SE from W Arkansas through NE Louisiana to the Red River. 605 mi. (975 km) long.
2. a member of a former North American Indian tribe, apparently of the Caddoan stock, of NE Louisiana.
Also, Washita .