Source : Webster's Revised Unabridged Dictionary (1913)

Ammunition \Am`mu*ni"tion\, n. [F. amunition, for munition,
   prob. caused by taking la munition as l'amunition. See
   {Munition}.]
   1. Military stores, or provisions of all kinds for attack or
      defense. [Obs.]

   2. Articles used in charging firearms and ordnance of all
      kinds; as powder, balls, shot, shells, percussion caps,
      rockets, etc.

   3. Any stock of missiles, literal or figurative.

   {Ammunition bread}, {shoes}, etc., such as are contracted for
      by government, and supplied to the soldiers. [Eng.]

Ammunition \Am`mu*ni"tion\, v. t. [imp. & p. p. {Ammunitioned};
   p pr. & vb. n. {Ammunitioning}.]
   To provide with ammunition.

Source : WordNet®

ammunition
     n 1: projectiles to be fired from a gun [syn: {ammo}]
     2: any nuclear or chemical or biological material that can be
        used as a weapon of mass destruction
     3: information that can be used to attack or defend a claim or
        argument or viewpoint; "his admission provided ammunition
        for his critics"