Definition of Kiowa in English Kiowa Syllabification: (Ki·o·wa)Pronunciation: /ˈkīəwə/ noun (plural same or Kiowas) 1a member of an American Indian people of the southern plains of the US, now living mainly in Oklahoma. 2the language of the Kiowa, related to the Tanoan group. 3 (in full Kiowa Apache) an Athabaskan (Apache) language of western Oklahoma and neighboring areas. adjective relating to the Kiowa or their languages. Origin:from American Spanish Caygua, perhaps from Caddoan kā́hīwa’ 'Kiowa'