Source : Webster's Revised Unabridged Dictionary (1913)

Armory \Ar"mo*ry\, n.; pl. {Armories}. [OF. armaire, armarie, F.
   armoire, fr. L. armarium place for keeping arms; but confused
   with F. armoiries. See {Armorial}, {Ambry}.]
   1. A place where arms and instruments of war are deposited
      for safe keeping.

   2. Armor; defensive and offensive arms.

            Celestial armory, shields, helms, and spears.
                                                  --Milton.

   3. A manufactory of arms, as rifles, muskets, pistols,
      bayonets, swords. [U.S.]

   4. Ensigns armorial; armorial bearings. --Spenser.

   5. That branch of heraldry which treats of coat armor.

            The science of heraldry, or, more justly speaking,
            armory, which is but one branch of heraldry, is,
            without doubt, of very ancient origin. --Cussans.