Definition of “terrorism” - English Dictionary

“terrorism” in British English

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terrorismnoun [ U ]

uk /ˈter.ər.ɪ.zəm/ us /ˈter.ər.ɪ.zəm/

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.

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(Definition of “terrorism” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“terrorism” in American English

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terrorismnoun [ U ]

us /ˈter·əˌrɪz·əm/

social studies violent action for political purposes

terrorist
noun [ C ] us /ˈter·ə·rəst/

(Definition of “terrorism” from the Cambridge Academic Content Dictionary © Cambridge University Press)