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

The man who was convicted of trying to kill Salman Rushdie is going on trial again, this time in a federal terrorism case that is probing deeper into what allegedly motivated the stabbing on a lecture stage in 2022. — ABC News, 22 July 2026

British counterterrorism police took over the investigation into Widdecombe’s killing on July 13, after officers initially stated there was no information to suggest her death was an act of terrorism. — Sana Noor Haq, CNN Money, 21 July 2026

My family includes police officers, a bomb squad member, and veterans who fought terrorism overseas. — Eric "doc" Stelnicki, Sun Sentinel, 20 July 2026

While in custody, new evidence caused Kerry to be rearrested under suspicion of commission, preparation, or instigation of an act of terrorism, reports ABC News. — Sophia Mandt, The Washington Examiner, 20 July 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