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

More than 1,100 Ukrainians, a fifth of them minors, have been accused of committing arson, terrorism, or sabotage, apparently Russian-backed, since 2022. —Tom Chivers, semafor.com, 15 June 2026

Gendron, who will turn 23 next week, has already pleaded guilty to state charges stemming from the May 14, 2022, attack at a Tops supermarket, including domestic terrorism motivated by hate. —Bill Hutchinson, ABC News, 15 June 2026

Last September, a state judge tossed out terrorism charges filed against Mangione. —Brian Mann, NPR, 15 June 2026

In December 2025, the US Attorney’s Office for the Southern District of New York charged Guerrero Flores with ordering, directing, and facilitating acts of terrorism within the United States. —Uriel Blanco, CNN Money, 13 June 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
• sophism
• statism
• sufism
• thomism
• tourism
• tropism
• abolitionism
• aldosteronism

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