The Collaborative International Dictionary of English v.0.48:

Zulu-Kaffir \Zu"lu-Kaf"fir\, n.
   A member of the Bantu race comprising the Zulus and the
   Kaffirs.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Zulu \Zu"lu\ (z[=oo]"l[=oo]), prop. n. [Also Zooloo.]
   1. Any member of the tribe of Zulus; a Zulu-Kaffir. See
      Zulus.
      [Webster 1913 Suppl.]

   2. (Philol.) One of the most important members of the South
      African, or Bantu, family of languages, spoken partly in
      Natal and partly in Zululand, but understood, and more or
      less in use, over a wide territory, at least as far north
      as the Zambezi; -- called also Zulu-Kaffir.
      [Webster 1913 Suppl.]

   3. A word used in spoken communications to represent the
      letter Z.
      [PJC]