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Noun: Siouan  soo-un
  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
    - Sioux
     
  2. A family of North American Indian languages spoken by the Sioux
    - Siouan language
Adjective: Siouan  soo-un
  1. Of or relating to the Sioux people or their language and culture
    "Siouan languages were spoken across a wide area of North America"

Derived forms: Siouans

Type of: American Indian, American Indian language, American-Indian language, Amerind, Amerind language, Amerindian language, Buffalo Indian, Indian, Indian language, Plains Indian

Encyclopedia: Siouan