Source : Webster's Revised Unabridged Dictionary (1913)

Antelope \An"te*lope\, n. [OF. antelop, F. antilope, fro Gr. ?,
   ?, Eustathius, ``Hexa["e]m.,'' p. 36, the origin of which is
   unknown.] (Zo["o]l.)
   One of a group of ruminant quadrupeds, intermediate between
   the deer and the goat. The horns are usually annulated, or
   ringed. There are many species in Africa and Asia.

         The antelope and wolf both fierce and fell. --Spenser.

   Note: The common or bezoar antelope of India is {Antilope
         bezoartica}. The chamois of the Alps, the gazelle, the
         addax, and the eland are other species. See {Gazelle}.
         The pronghorn antelope ({Antilocapra Americana}) is
         found in the Rocky Mountains. See {Pronghorn}.

Source : WordNet®

antelope
     n : graceful Old World ruminant with long legs and horns
         directed upward and backward; includes gazelles;
         springboks; impalas; addax; gerenuks; blackbucks;
         dik-diks