Plains Indian
noun
a member of any of the American Indian tribes, as those of the Algonquian, Athabascan, Caddoan, Kiowa, Siouan, or Uto-Aztecan linguistic families, that formerly inhabited the Great Plains. All were more or less nomadic, following the buffalo, and were often in touch with one another so that the development among them of common culture traits is noticeable.
Also called Buffalo Indian.
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British Dictionary definitions for buffalo indian
Plains Indian
noun
a member of any of the North American Indian peoples formerly living in the Great Plains of the US and Canada
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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