[1] : The Collaborative International Dictionary of English v.0.48

weapon \weap"on\ we^p"u^n; 277, n. oe. wepen, as.
   w=aepen; akin to os. w=apan, ofries. w=epin, w=epen,
   d. wapen, g. waffe, ohg. waffan, w=afan, icel. v=apn,
   dan. vaaben, sw. vapen, goth. w=epna, 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
see also:
wapentake concealed weapons concealed weapon salve 

[2] : WordNet (r) 2.0

weapon
     n 1: any instrument or instrumentality used in fighting or
          hunting; "he was licensed to carry a weapon" syn: arm,
           weapon system
     2: a means of persuading or arguing; "he used all his
        conversational weapons" syn: artillery
see also:
arm weapon system artillery 

[3] : Moby Thesaurus II by Grady Ward, 1.0

23 moby thesaurus words for "weapon":
   a-weapons, armament, arms, biological weapons,
   conventional weapons, cutting edge, deadly weapons, edge,
   edge tool, featheredge, instruments of destruction, knife-edge,
   missilery, munitions, musketry, nuclear weapons, ordnance,
   razor-edge, side arms, small arms, thermonuclear weapons, weaponry,
   weapons

Weapon >> W Words
Weapon, definition of term: Weapon
weapon_pag1.html

Nuclear Weapon >> N Words
Nuclear Weapon, definition of term: Nuclear Weapon
nuclear+weapon_pag1.html