NOUN (2)

1. horned sheep of Devon; valued for mutton;

2. stocky breed of pony with a fawn-colored nose;

The Collaborative International Dictionary of English v.0.48:

Exmoor \Ex"moor\, n. [From Exmoor, a district in Somersetshire
   and Devonshire.]
   1. One of a breed of horned sheep of Devonshire, England,
      having white legs and face and black nostrils. They are
      esp. valuable for mutton.
      [Webster 1913 Suppl.]

   2. A breed of ponies native to the Exmoor district.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

Exmoor
    n 1: horned sheep of Devon; valued for mutton
    2: stocky breed of pony with a fawn-colored nose