The Collaborative International Dictionary of English v.0.48:

Concealed \Con*cealed"\, a.
   Hidden; kept from sight; secreted. -- Con*ceal"ed*ly, adv.
   -- Con*ceal"ed*ness, n.
   [1913 Webster]

   Concealed weapons (Law), dangerous weapons so carried on
      the person as to be knowingly or willfully concealed from
      sight, -- a practice forbidden by statute.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Weapon \Weap"on\ (w[e^]p"[u^]n; 277), n. [OE. wepen, AS.
   w[=ae]pen; akin to OS. w[=a]pan, OFries. w[=e]pin, w[=e]pen,
   D. wapen, G. waffe, OHG. waffan, w[=a]fan, Icel. v[=a]pn,
   Dan. vaaben, Sw. vapen, Goth. w[=e]pna, pl.; of uncertain
   origin. Cf. Wapentake.]
   [1913 Webster]
   1. An instrument of offensive of defensive combat; something
      to fight with; anything used, or designed to be used, in
      destroying, defeating, or injuring an enemy, as a gun, a
      sword, etc.
      [1913 Webster]

            The weapons of our warfare are not carnal. --2 Cor.
                                                  x. 4.
      [1913 Webster]

            They, astonished, all resistance lost,
            All courage; down their idle weapons dropped.
                                                  --Milton.
      [1913 Webster]

   2. Fig.: The means or instrument with which one contends
      against another; as, argument was his only weapon.
      "Woman's weapons, water drops." --Shak.
      [1913 Webster]

   3. (Bot.) A thorn, prickle, or sting with which many plants
      are furnished.
      [1913 Webster]

   Concealed weapons. See under Concealed.

   Weapon salve, a salve which was supposed to cure a wound by
      being applied to the weapon that made it. [Obs.] --Boyle.
      [1913 Webster]