Definition of weapon noun from the Oxford Advanced American Dictionary

      

    weapon

     noun
    noun
    NAmE//ˈwɛpən//
     
     
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  1. 1an object such as a knife, gun, bomb, etc. that is used for fighting or attacking someone nuclear weapons a lethal/deadly weapon The police still haven't found the murder weapon. He was charged with carrying an offensive weapon. Topic CollocationsWar and Peacestarting a war declare/wage war (on somebody/something) go to war (against/with somebody) cause/spark/provoke/foment/quell unrest incite/lead/crush/suppress a revolt/rebellion launch/mount/carry out a surprise/terrorist attack prevent/halt/represent an escalation of the conflict be torn apart by/be on the brink of civil war enter/invade/occupy somebody's territory lead/launch/resist/repel an invasionmilitary operations adopt/develop/implement/pursue a military strategy carry out/execute/perform military operations/maneuvers send/deploy/station/pull back/withdraw troops go on/fly/carry out a reconnaissance/rescue mission train/equip/deploy army/military/combat units lead/launch/conduct an (air/airborne/amphibious) attack/a surprise attack (on somebody); an assault/a raid (on somebody) employ/use guerrilla tactics conduct/wage biological/guerrilla warfare fight/crush/defeat the rebels/the insurgency suffer/inflict a crushing defeat achieve/win a decisive victory halt/stop the American/German advance order/force a retreatfighting join/serve in the Army/Navy/Air Force/Marines/Coast Guard/reserves be/go/remain/serve on active duty do/complete/return from a tour of duty be sent to the front (line) attack/strike/engage/defeat/kill/destroy the enemy witness/see/report/be engaged in heavy fighting call for/be met with armed resistance come under heavy/machine-gun/mortar fire fire a machine gun/mortar shells/rockets (at somebody/something) shoot a rifle/a pistol/bullets/missiles launch/fire a(n) cruise/ballistic/anti-tank missile use biological/chemical/nuclear weapons inflict/suffer/sustain heavy losses/casualties be hit/killed by enemy/friendly/artillery fire become/be held as/be taken as a prisoner of warcivilians in war harm/kill/target/protect innocent/unarmed civilians cause/avoid/limit/minimize civilian casualties/collateral damage impose/enforce/lift a curfew engage in/be a victim of ethnic cleansing be sent to a concentration/an internment camp accept/house/resettle/turn away refugees fleeing from war fear/threaten military/violent reprisals commit/be accused of war crimes/crimes against humanity/genocidemaking peace make/bring/win/achieve/maintain/promote peace call for/negotiate/broker/declare a ceasefire/a temporary truce sign a ceasefire agreement call for/bring/put an end to hostilities demand/negotiate/accept the surrender of somebody/something establish/send (in) a peacekeeping force negotiate/conclude/ratify/sign/accept/reject/break/violate a peace treaty see also biological weapon, chemical weapon
  2. 2something such as knowledge, words, actions, etc. that can be used to attack or fight against someone or something Education is the only weapon to fight the spread of the disease. Guilt is the secret weapon for controlling children.
  3. Idioms
    be a double-edged sword/weapon
     
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    to be something that has both advantages and disadvantages
See the Oxford Advanced Learner's Dictionary entry: weapon