Source : Webster's Revised Unabridged Dictionary (1913)

Spoor \Spoor\, n. [D. spoor; akin to AS. spor, G. spur, and from
   the root of E. spur. [root]171. See {Spur}.]
   The track or trail of any wild animal; as, the spoor of an
   elephant; -- used originally by travelers in South Africa.

Spoor \Spoor\, v. i.
   To follow a spoor or trail. [R.]

Source : WordNet®

spoor
     n : the trail left by a person or an animal; what the hunter
         follows in pursuing game; "the hounds followed the fox's
         spoor"