LubaPronunciation: /ˈluːbə/Definition of Luba noun (plural same or Lubas) 1a member of a people living mainly in SE Democratic Republic of Congo (Zaire). 2 [mass noun] the Bantu language of the Luba, with about 8 million speakers. Also called Chiluba. adjective relating to the Luba or their language. Origin:a local nameLuba in other Oxford dictionaries Definition of Luba in the US English dictionary