ChickasawPronunciation: /ˈtʃɪkəsɔː/Definition of Chickasaw noun (plural same or Chickasaws) 1a member of an American Indian people formerly resident in Mississippi and Alabama, and now in Oklahoma. 2 [mass noun] the Muskogean language of the Chickasaw, now all but extinct. adjective relating to the Chickasaw or their language. Origin:the name in ChickasawChickasaw in other Oxford dictionaries Definition of Chickasaw in the US English dictionary