The Collaborative International Dictionary of English v.0.48:

Bantu \Ban"tu\, prop. n.
   A member of one of the great family of Negroid tribes
   occupying equatorial and southern Africa. These tribes
   include, as important divisions, the Kafirs, Damaras,
   Bechuanas, and many tribes whose names begin with Aba-, Ama-,
   Ba-, Ma-, Wa-, variants of the Bantu plural personal prefix
   Aba-, as in Ba-ntu, or Aba-ntu, itself a combination of this
   prefix with the syllable -ntu, a person; or as in Watusi.
   [Webster 1913 Suppl.]

   2. the family of languages spoken by the Bantu people
      (definition 1).
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Bantu \Ban"tu\ adj.
   1. Of or pertaining to the Bantu language group Bantu
      (definition 2); as, Bantu languages.
      [WordNet 1.5]

   2. of or pertaining to the Bantu people (definition 1). The
      Bantu population of Sierra Leone
      [WordNet 1.5]

WordNet (r) 3.0 (2006):

Bantu
    adj 1: of or relating to the African people who speak one of the
           Bantoid languages or to their culture; "the Bantu
           population of Sierra Leone"
    n 1: a member of any of a large number of linguistically related
         peoples of Central and South Africa
    2: a family of languages widely spoken in the southern half of
       the African continent [syn: Bantu, Bantoid language]