Definition of terrorism

: the systematic use of terror especially as a means of coercion



[ter·​ror·​ist | \ ˈter-ər-ist]

An advocate or practitioner of terrorism as a means of coercion.

Terrorist adjective

Definition of terrorist

Or, relating to, or characteristic of terrorists or terrorism : practicing or involving violent acts of terror a terrorist organization



[ter·​ror | \ ˈter-ər , ˈte-rər ]

1: a state of intense or overwhelming fear overcome by terror people fleeing the scene in terror He lived in terror of being caught.

2: violence or the threat of violence used as a weapon of intimidation or coercion a regime that rules by terror especially : violent or destructive acts (such as bombing) committed by groups in order to intimidate a population or government into granting their demands an act of terror the war on terror.

3: a very frightening or terrifying aspect the terrors of war

4a: someone or something that inspires fear.

 informal: an extremely disruptive or annoying person or thing.