The Collaborative International Dictionary of English v.0.48:

Gaur \Gaur\ (g[add]r or gour), n. [Native name.] (Zool.)
   An East Indian species of wild cattle (Bibos gauris), of
   large size and an untamable disposition. [Spelt also gour.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gour \Gour\, n. [See Giaour.]
   1. A fire worshiper; a Gheber or Gueber. --Tylor.
      [1913 Webster]

   2. (Zool.) See Koulan.
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The Collaborative International Dictionary of English v.0.48:

Koulan \Kou"lan\, n. [Native name.] (Zool.)
   A wild horse (Equus onager or Asinus onager) inhabiting
   the plains of Central Asia; -- called also gour, khur,
   and onager. [Written also kulan.]
   [1913 Webster]

   Note: It is sometimes confounded with the dziggetai, to which
         it is closely related. It is gray in winter, but
         fulvous in summer. It has a well defined, dark, dorsal
         stripe, and a short, erect mane. In size, it is
         intermediate between the horse and ass.
         [1913 Webster]