weapon

American  

[wep-uhn] / ˈwɛp ən /

noun

1. any instrument or device for use in attack or defense in combat, fighting, or war, as a sword, rifle, or cannon.

2. anything used against an opponent, adversary, or victim.

   the deadly weapon of satire.

3. Zoology. any part or organ serving for attack or defense, as claws, horns, teeth, or stings.

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verb (used with object)

1. to supply or equip with a weapon or weapons.

   to weapon aircraft with heat-seeking missiles.

weapon British  

/ ˈwɛpən /

noun

1. an object or instrument used in fighting

2. anything that serves to outwit or get the better of an opponent

   his power of speech was his best weapon

3. any part of an animal that is used to defend itself, to attack prey, etc, such as claws, teeth, horns, or a sting

4. a slang word for penis

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Other Word Forms

• outweaponed
  adjective
• superweapon
  noun
• unweaponed
  adjective
• weaponed
  adjective
• weaponless
  adjective

Etymology

Origin of weapon

First recorded before 900; Middle English wepen, Old English wǣpen; cognate with German Waffe, Old Norse vāpn, Gothic wēpna (plural)

Explanation

A weapon is something used to hurt someone. Soldiers use weapons like guns and even sometimes use "weapons of mass destruction" — like bombs. In school, the only weapon you should use is a spitball. A solider engaging in battle needs a weapon, as does a police officer defending herself against a violent attacker. Some weapons are specially designed for killing or injuring, such as guns and crossbows, while in other cases an ordinary object, like a stick, can be used as a weapon. The Old English root is wæpen, "instrument of fighting or defense." The spelling is tricky, and most people just have to memorize the ea in weapon.

Example Sentences

"Iran should not use this strait as a weapon to pressure or to blackmail the Gulf countries," Qatari foreign minister Sheikh Mohammed bin Abdulrahman Al Thani told reporters in Doha on Tuesday.

From Barron's • May 12, 2026

President Trump said on Wednesday that the U.S. has had “good talks” with Iranian negotiators and the country has agreed not to have a nuclear weapon.

From The Wall Street Journal • May 7, 2026

A man has been arrested on suspicion of a public order offence and possessing an offensive weapon close to Andrew Mountbatten-Windsor's home in Norfolk.

From BBC • May 7, 2026

But deputies also had a trick up their sleeve — a secret weapon that is part grappling gun, part lasso.

From Los Angeles Times • May 7, 2026

Not the best weapon for self-defense, but it would serve in a pinch.

From "The City Beautiful" by Aden Polydoros

Related Words

• ammunition
• bomb
• cannon
• firearm
• gun
• knife
• machete
• machine gun
• missile
• nerve gas
• pistol
• revolver
• rifle
• shotgun
• sword
• tear gas