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

anything used against an opponent, adversary, or victim

the deadly weapon of satire.

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

to supply or equip with a weapon or weapons

to weapon aircraft with heat-seeking missiles.

noun

ammunition , anlace , arbalest , archery , arrow , assegai , atlatl , ax , axe , backsword , ballista , banderilla , barong , bat , baton , battle-ax , bayonet , bazooka , billy club , blackjack , blade , blowgun , bludgeon , bomb , boomerang , bow and arrow , bowie knife , brass knuckles , cannon , catapult , cleaver , club , crossbow , cudgel , cutlass , dagger , dart , dirk , firearm , flamethrower , gun , harpoon , hatchet , howitzer , hunting knife , knife , lance , machete , machine gun , missile , musket , nerve gas , nuclear bomb , nunchaku , pistol , revolver , rifle , saber , scythe , shotgun , slingshot , spear , spike , stiletto , switchblade , sword , tear gas , arm , armament , artillery , bomber , carbine , claw , derringer , epee , mortar , munitions , sling , talon , tank , tomahawk , trident , whip