The Collaborative International Dictionary of English v.0.48:

Cheetah \Chee"tah\, n. [Hind. ch[imac]t[=a].] (Zool.)
   A species of leopard (Cyn[ae]lurus jubatus) tamed and used
   for hunting in India. The woolly cheetah of South Africa is
   Cyn[ae]lurus laneus. It runs very fast in short spurts
   while hunting. [Written also chetah.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

cheetah
    n 1: long-legged spotted cat of Africa and southwestern Asia
         having nonretractile claws; the swiftest mammal; can be
         trained to run down game [syn: cheetah, chetah,
         Acinonyx jubatus]