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

While recording Fenian, Mo Chara faced a terrorism charge for allegedly displaying a Hezbollah flag during a show. —Brittney Melton, NPR, 4 May 2026

The white political elite of the former Confederacy assiduously fought the reforms that liberated African Americans, particularly the right to vote, introducing poll taxes and literacy tests, as well as resorting to terrorism by the likes of the Ku Klux Klan to turn back the clock. —Clarence Page, Chicago Tribune, 3 May 2026

On Friday, Metropolitan Police chief Mark Rowley sought to draw equivalence between the threat to Jewish communities from Islamic terrorism and other types of terrorists, though the only notable attacks have come from Islamic terrorists. —Brady Knox, The Washington Examiner, 2 May 2026

Police called the attack an act of terrorism. —CBS News, 2 May 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