'Siouan' definitions:
Definition of 'Siouan'
(from WordNet)
adjective
Of or relating to the Sioux people or their language and culture
noun
A member of a group of North American Indian peoples who spoke a Siouan language and who ranged from Lake Michigan to the Rocky Mountains [syn: Sioux, Siouan]
noun
A family of North American Indian languages spoken by the Sioux [syn: Siouan, Siouan language]