Source : Webster's Revised Unabridged Dictionary (1913)

Boar \Boar\, n. [OE. bar, bor, bore, AS. b[=a]r; akin to OHG.
   p?r, MHG. b?r, G. b["a]r, boar (but not b["a]r bear), and
   perh. Russ. borov' boar.] (Zo["o]l.)
   The uncastrated male of swine; specifically, the wild hog.

Source : WordNet®

boar
     n 1: Old World wild swine having a narrow body and prominent
          tusks from which most domestic swine come; introduced in
          United States [syn: {wild boar}, {Sus scrofa}]
     2: an uncastrated male hog