terrorism

noun

ter·​ror·​ism ˈter-ər-ˌi-zəm How to pronounce terrorism (audio)
Synonyms of terrorism
: the systematic use of terror especially as a means of coercion

Examples of terrorism in a Sentence

They have been arrested for acts of terrorism.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
However, in recent years, referrals for extreme right-wing terrorism have frequently equalled or surpassed those for Islamist extremism. The Week Uk, TheWeek, 7 June 2026 Luke was arrested and charged with making a threat to conduct a mass shooting or an act of terrorism. Donie O'Sullivan, CNN Money, 6 June 2026 At the press conference, state and local officials also detailed security arrangements designed to reduce the risk of crime and terrorism. Brian Mann, NPR, 4 June 2026 The four men were convicted of terrorism charges. ABC News, 3 June 2026 See All Example Sentences for terrorism

Word History

First Known Use

1795, in the meaning defined above

Time Traveler
The first known use of terrorism was in 1795

Browse Nearby Words

Cite this Entry

“Terrorism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/terrorism. Accessed 10 Jun. 2026.

Kids Definition

terrorism

noun
ter·​ror·​ism ˈter-ər-ˌiz-əm How to pronounce terrorism (audio)
: the use of terror as a means of achieving a goal
terrorist adjective or noun

Legal Definition

terrorism

noun
ter·​ror·​ism ˈter-ər-ˌi-zəm How to pronounce terrorism (audio)
1
: the unlawful use or threat of violence especially against the state or the public as a politically motivated means of attack or coercion
2
: violent and intimidating gang activity
street terrorism
terrorist adjective or noun
terroristic adjective
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster