The Collaborative International Dictionary of English v.0.48:

Hunting \Hunt"ing\, n.
   The pursuit of game or of wild animals. --A. Smith.
   [1913 Webster]

   Happy hunting grounds, the region to which, according to
      the belief of American Indians, the souls of warriors and
      hunters pass after death, to be happy in hunting and
      feasting. --Tylor.

   Hunting box. Same As Hunting lodge (below).

   Hunting cat (Zool.), the cheetah.

   Hunting cog (Mach.), a tooth in the larger of two geared
      wheels which makes its number of teeth prime to the number
      in the smaller wheel, thus preventing the frequent meeting
      of the same pairs of teeth.

   Hunting dog (Zool.), the hyena dog.

   Hunting ground, a region or district abounding in game;
      esp. (pl.), the regions roamed over by the North American
      Indians in search of game.

   Hunting horn, a bulge; a horn used in the chase. See
      Horn, and Bulge.

   Hunting leopard (Zool.), the cheetah.

   Hunting lodge, a temporary residence for the purpose of
      hunting.

   Hunting seat, a hunting lodge. --Gray.

   Hunting shirt, a coarse shirt for hunting, often of
      leather.

   Hunting spider (Zool.), a spider which hunts its prey,
      instead of catching it in a web; a wolf spider.

   Hunting watch. See Hunter, 6.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hunting ground
    n 1: a place where opportunities abound
    2: an area in which game is hunted