WordWeb Online

1. Any instrument or instrumentality used in fighting or hunting
   "he was licensed to carry a weapon";
   - arm, weapon system
    
2. A means of persuading or arguing
   "he used all his conversational weapons";
   - artillery

Derived forms: weapons

Type of: instrument, persuasion, suasion [rare]

Part of: arms, implements of war, munition, weaponry, weapons system

Encyclopedia: Weapon