Source : Webster's Revised Unabridged Dictionary (1913)

Bull \Bull\, n. [OE. bule, bul, bole; akin to D. bul, G. bulle,
   Icel. boli, Lith. bullus, Lett. bollis, Russ. vol'; prob. fr.
   the root of AS. bellan, E. bellow.]
   1. (Zo["o]l.) The male of any species of cattle
      ({Bovid[ae]}); hence, the male of any large quadruped, as
      the elephant; also, the male of the whale.

   Note: The wild bull of the Old Testament is thought to be the
         oryx, a large species of antelope.

   2. One who, or that which, resembles a bull in character or
      action. --Ps. xxii. 12.

   3. (Astron.)
      (a) Taurus, the second of the twelve signs of the zodiac.
      (b) A constellation of the zodiac between Aries and
          Gemini. It contains the Pleiades.

                At last from Aries rolls the bounteous sun, And
                the bright Bull receives him.     --Thomson.

   4. (Stock Exchange) One who operates in expectation of a rise
      in the price of stocks, or in order to effect such a rise.
      See 4th {Bear}, n., 5.

   {Bull baiting}, the practice of baiting bulls, or rendering
      them furious, as by setting dogs to attack them.

   {John Bull}, a humorous name for the English, collectively;
      also, an Englishman. ``Good-looking young John Bull.''
      --W. D.Howells.

   {To take the bull by the horns}, to grapple with a difficulty
      instead of avoiding it.

Source : WordNet®

Bovidae
     n : true antelopes; cattle; oxen; sheep; goats [syn: {family
         Bovidae}]