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terrorism

noun [U]
 
 
/ˈter.ə.rɪ.zəm/ US  /-ɚ.ɪ-/

Definition

B2 (threats of) violent action for political purposes: Governments must cooperate if they are to fight/combat international terrorism. The bomb explosion was one of the worst acts of terrorism that the country had experienced in recent years.Terrorism and political crime
(Definition of terrorism noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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