NyamweziPronunciation: /ˌnjamˈweɪzi/Definition of Nyamwezi noun (plural same or Nyamwezis) 1a member of a people inhabiting western Tanzania. 2 [mass noun] the Bantu language of the Nyamwezi, related to Sukuma and having about 900,000 speakers. adjective relating to the Nyamwezi or their language. Origin:a local name