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

Worse still, the world’s navies are simply not equipped to provide the level of protection required against terrorism, piracy, and regional wars. —David Szondy february 15, New Atlas, 15 Feb. 2026

In Miami, the attack on the rescue planes was widely considered an act of terrorism directed from the top. —Claire Heddles, Miami Herald, 13 Feb. 2026

The effort appears to be the first use of a law enacted three years ago allowing the revocation of citizenship and subsequent deportation of Palestinian citizens who were convicted of certain violent crimes such as terrorism and received financial support from the Palestinian Authority as a reward. —Landon Mion, FOXNews.com, 13 Feb. 2026

Kalshi is regulated by the Commodity Futures Trading Commission, which bans offering bets that involve wars, terrorism and assassinations. —Bobby Allyn, NPR, 12 Feb. 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