terrorism

noun

ter·​ror·​ism ˈter-ər-ˌi-zəm 

: 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

Noem is right that this was an act of domestic terrorism. —Voice Of The People, New York Daily News, 12 Jan. 2026

Noem has faced heat from Democrats and some Republicans for her quick declaration that the incident was domestic terrorism. —Jared Gans, The Hill, 12 Jan. 2026

Officials do not believe that the incident was politically motivated or an act of terrorism but stemmed from an altercation in the crowd, Gabaldon said. —Cerys Davies, Los Angeles Times, 12 Jan. 2026

Manhattan District Attorney Alvin Bragg's office had charged Mangione with terrorism enhancements in order to justify a first-degree murder charge under state law, which could have been punished with a maximum sentence of life in prison without the possibility of parole. —Michael Ruiz, FOXNews.com, 12 Jan. 2026

Word History

First Known Use

1795, in the meaning defined above

Phrases Containing terrorism

• anti-terrorism
• counter-terrorism
• narco-terrorism
• state terrorism

Rhymes for terrorism

• autism
• fascism
• racism
• sikhism
• statism
• sufism
• thomism
• tourism
• tropism
• abolitionism
• aldosteronism
• americanism

Kids Definition

terrorism

noun

ter·​ror·​ism ˈter-ər-ˌiz-əm 

: the use of terror as a means of achieving a goal

terrorist

-ər-əst 

adjective or noun

Legal Definition

terrorism

noun

ter·​ror·​ism ˈter-ər-ˌi-zəm 

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

-ist 

adjective or noun

terroristic

ˌter-ər-ˈis-tik 

adjective