Source : Webster's Revised Unabridged Dictionary (1913)

Topi \To"pi\, n.
   An antelope ({Damaliscus corrigum jimela}) having a glossy
   purplish brown coat. It is related to the blesbok and is
   native of British East Africa. Also, any of various related
   varieties of other districts south of the Sahara.

Source : WordNet®

topi
     n 1: a light-weight hat worn in tropical countries for protection
          from the sun [syn: {pith hat}, {pith helmet}, {sun
          helmet}, {topee}]
     2: a large South African antelope; considered the swiftest
        hoofed mammal [syn: {sassaby}, {Damaliscus lunatus}]