English Reference
noun · adjective

terrorist

n. · adj.
US /ˈtɛɹɝɪst/ UK /tˈɛɹəɹˌɪst/ ter·ror·ist UK spelling terrorist's, terrorist's

  1. 01 B2 Upper Intermediate

    n.someone who uses violence, like bombs or attacks, to scare people and force a government to change.

    n.a person who uses unlawful violence and intimidation, especially against civilians, in the pursuit of political aims.

    Simple

    The government increased security at the airport to prevent a terrorist attack.

    In context

    International intelligence agencies collaborated to dismantle the network before the terrorist cell could execute its planned assault on the capital.

    Usage

    Often used as a modifier before other nouns like 'attack', 'group', or 'threat'.

    pacifistpeacekeeper
  2. 02 B2 Upper Intermediate

    adj.relating to or involving the use of violence for political reasons.

    adj.of or relating to the characteristics or actions of terrorism; typically used as an attributive adjective.

    Simple

    The police are investigating several terrorist threats made online.

    In context

    The new legislation aims to curb terrorist financing by increasing the transparency of international wire transfers.

    Usage

    This adjective form is non-gradable; one cannot be 'more terrorist' than another.

    terroristic
  3. 03 C2 Proficiency ArchaicTechnical

    n.a person involved in the Reign of Terror during the French Revolution.

    n.an agent or partisan of the revolutionary tribunal during the Reign of Terror in France (1793–1794).

    Simple

    In history class, we learned how the original terrorists were part of the French Revolution.

    In context

    The term was originally applied to the Jacobins, specifically those terrorists who orchestrated the state-sanctioned executions during the revolutionary period.

    Teacher's tip

    This is the historical origin of the word; in modern contexts, it has lost this specific association with state-led French history.

Usage terrorist organisation · terrorist attacks · terrorist financing

The US has for years refused contact with Hamas, which it classifies as a “terrorist organisation”.

Al Jazeera· 16 Aug 2026

Prime Minister Anthony Albanese said: "We must do everything we can to make sure the antisemitic terrorist attack in Bondi doesn't happen again.

BBC News· 15 Aug 2026

From terror + -ist. In the historical sense, after French terroriste. First used in 1794 in the Courier and Evening Gazette.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin French terroriste
Level B2 · Upper Intermediate
Frequency Common
Updated