Pronunciation: (wosh'i-tô", wô'shi-),[key] —n., —pl.-tas,(esp. collectively)-tafor 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.