Definition of crackdown noun from the Oxford Advanced American Dictionary

 

crackdown

 noun
noun
NAmE//ˈkrækdaʊn//
 
crackdown (on somebody/something)
 
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severe action taken to restrict the activities of criminals or of people opposed to the government or someone in authority a military crackdown on student protesters a crackdown on crime
See the Oxford Advanced Learner's Dictionary entry: crackdown