gun noun definition in Weapons topic from the Oxford Advanced Learner's Dictionary

gun

 noun: Weapons topic
[countable] a weapon that is used for firing bullets or shells to fire a gun at somebody a toy gun anti-aircraft guns Look out, he's got a gun! Should police officers carry guns? He pointed/aimed the gun at her head. The police officers drew their guns (= took them out so they were ready to use). She pulled a gun on me (= took out a gun and aimed it at me). The gun went off by accident. The attacker held a gun to the hostage’s head. a gun battle between rival gangs

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