LakotaPronunciation: /ləˈkəʊtə/Definition of Lakota noun (plural same or Lakotas) 1a member of an American Indian people of western South Dakota (also called Teton Sioux). 2 [mass noun] the Siouan language of the Lakota, with about 6,000 speakers. adjective relating to the Lakota or their language. Origin:the name in Lakota, related to the word Dakota1Lakota in other Oxford dictionaries Definition of Lakota in the US English dictionary