group of North American Indian peoples that inhabited the area between Lake Michigan to the Rocky Mountains, Dakota; member of the Sioux peoples; any of a number of Siouan languages spoken by the Sioux
The Sioux are a Native American tribe and First Nations band government in North America. The term can refer to any ethnic group within the Great Sioux Nation or any of the nation's many language dialects. The Sioux comprise three major divisions based on Siouan dialect and subculture: the Santee, the Yankton-Yanktonai, and the Lakota.
Noun 1. 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 (synonym) Siouan (hypernym) Plains Indian, Buffalo Indian (hyponym) Biloxi