kafir, n. [Ar. k infidel, pagan, fr. kafara to be skeptical in religious matters; -- a name given to certain infidel races by the Mohammedans. Cf. Giaour.].
One of a race which, with the Hottentots and Bushmen, inhabit South Africa. They inhabit the country north of Cape Colony, the name being now specifically applied to the tribes living between Cape Colony and Natal, including the Ponda, Xosa, and Tembu; but the Zulus of Natal are true Kaffirs. [1913 Webster]
Any Black African; -- a disparaging and offensive term used by white South Africans. [WordNet 1.5]
Kaffir corn(Bot.), a Cape Colony name for Indian millet.