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

Unfortunately, record levels of antisemitism and high profile terrorism have challenged that assumption. — Richard Priem, Sun Sentinel, 8 Sep. 2026

The United States may not have won the war on terrorism, but the jihadis clearly lost. — Daniel Byman, Foreign Affairs, 8 Sep. 2026

Europol does not keep statistics on nihilistic violent extremism because definitions of it differ and acts can fall into the category of ordinary criminality as well as terrorism. — Lorne Cook, Fortune, 8 Sep. 2026

The Mass will also focus on the call for peace and the end of terrorism and violence. — The Baltimore Sun, Baltimore Sun, 8 Sep. 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