Noun has 2 senses

• siouan(n = noun.person) sioux - 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;




• siouan(n = noun.communication) siouan language - a family of North American Indian languages spoken by the Sioux;

Adjective has 1 sense

• siouan(a = adj.pert) - of or relating to the Sioux people or their language and culture;
Derived form noun sioux₁