'Weapon' definitions:

Definition of 'weapon'

From: WordNet
noun
Any instrument or instrumentality used in fighting or hunting; "he was licensed to carry a weapon" [syn: weapon, arm, weapon system]
noun
A means of persuading or arguing; "he used all his conversational weapons" [syn: weapon, artillery]

Definition of 'Weapon'

From: GCIDE
  • 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]

Synonyms of 'weapon'

From: Moby Thesaurus