| Noun | 1. | Siouan language - a family of North American Indian languages spoken by the Sioux American-Indian language, Amerind, Amerindian language, American Indian, Indian - any of the languages spoken by Amerindians Biloxi - the Siouan language spoken by the Biloxi Catawba - the Siouan language spoken by the Catawba Chiwere - the Siouan language spoken by the Iowa and Oto and Missouri Crow - a Siouan language spoken by the Crow Dakota - the Siouan language spoken by the Dakota Dhegiha - a branch of the Siouan languages Gros Ventre, Hidatsa - a Siouan language spoken by the Hidatsa Hunkpapa - a Siouan language spoken by the Hunkpapa Ofo - a Siouan language spoken by the Ofo Santee - the Siouan language spoken by the Santee Tutelo - the Siouan language spoken by the Tutelo Winnebago - the Siouan language spoken by the Winnebago |