Definition of 'siouan'

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
      Synonyms: Sioux
2. a family of North American Indian languages spoken by the Sioux
      Synonyms: Siouan language

Adjective

1. of or relating to the Sioux people or their language and culture

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