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Synonyms

terrorist

American  
[ter-er-ist] / ˈtɛr ər ɪst /

noun

  1. a person, usually a member of a group, who uses or advocates terrorism.

  2. a person who terrorizes or frightens others.

  3. (formerly) a member of a political group in Russia aiming at the demoralization of the government by terror.

  4. an agent or partisan of the revolutionary tribunal during the Reign of Terror in France.


adjective

  1. of, relating to, or characteristic of terrorism or terrorists.

    terrorist tactics.

terrorist British  
/ ˈtɛrərɪst /

noun

    1. a person who employs terror or terrorism, esp as a political weapon

    2. ( as modifier )

      terrorist tactics

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of terrorist

First recorded in 1785–95; terror + -ist; compare French terroriste

Explanation

Someone who uses violence, mayhem, and destruction — or the threat of those things — to coerce people or countries into taking a certain action is a terrorist. A terrorist may be motivated by religious fervor, politics, or just plain old-fashioned greed. Terrorist has at its root the word "terror," which comes from the Latin word terrorem, meaning great fear. Great fear is exactly what terrorists hope to create so they can manipulate the situation to their benefit. The label terrorist is a subjective one. To the British, the American colonists who destroyed shiploads of tea in Boston Harbor in 1773 were terrorists. To colonists, they were patriots and heroes.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Zeraati's employer, Iran International, had also been designated by the Iranian government as a "terrorist organisation", the jury heard.

From BBC • May 18, 2026

The LNA is capable of "protecting the borders from all attacks", he added, citing threats from "smugglers or terrorist groups currently moving through Mali, Niger and other countries in attempts to enter Libya".

From Barron's • May 17, 2026

"We have evidence that terrorist content and illegal hate speech is persisting on some of the largest social media sites," said Oliver Griffiths, Ofcom's online safety director.

From Barron's • May 15, 2026

The outbreak of war between the U.S. and Iran sparked fears across the region that Tehran or its proxies would unleash a wave of cross-border terrorist attacks.

From The Wall Street Journal • May 13, 2026

It was then that I remembered my aunt Angie, and that my father was telling anyone who would listen that she had put his name on a terrorist watch list.

From "Educated" by Tara Westover

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