Arms vs Weapons

When to use each in English, with meaning, register, and examples.

	Arms	Weapons
Meaning	The upper limbs of the body used for lifting and holding things.	Tools used for fighting or killing.
CEFR level	B2	-
Part of speech	noun
Usage notes	Commonly used in both formal and informal contexts. Appropriate when discussing the human body, physical actions, or even metaphorical uses (e.g., 'arms of a chair'). Not suitable for abstract contexts.	The term 'weapons' is typically used in discussions of military, law enforcement, and self-defense contexts. Avoid using it in casual conversation unless relevant to the topic.

Frequently asked questions: Arms vs Weapons

What's the difference between "Arms" and "Weapons"?

"Arms" means: The upper limbs of the body used for lifting and holding things. "Weapons" means: Tools used for fighting or killing.

When should I use "Arms" and "Weapons"?

They can all be used in everyday English.