Weapon | Mean of weapon in English Dictionary

/ˈwɛpən/

• Noun
• something (such as a gun, knife, club, or bomb) that is used for fighting or attacking someone or for defending yourself when someone is attacking you
1. assault with a deadly weapon
2. a concealed weapon
3. chemical/biological weapons [=weapons that use dangerous chemicals, germs, etc.]
4. weapons of mass destruction [=weapons that can destroy entire cities, regions, etc.]
5. The police never found the murder weapon. [=the weapon used to commit murder]
• something (such as a skill, idea, or tool) that is used to win a contest or achieve something
1. The pitcher's slider is his most effective weapon.
2. a new weapon in the fight against cancer
3. The mayor's campaign unleashed its secret weapon.