'Terrorist' definitions:

Definition of 'terrorist'

From: WordNet
noun
A radical who employs terror as a political weapon; usually organizes with other terrorists in small cells; often uses religion as a cover for terrorist activities

Definition of 'Terrorist'

From: GCIDE
  • Terrorist \Ter"ror*ist\, n. [F. terroriste.]
  • 1. One who governs by terrorism or intimidation; specifically, an agent or partisan of the revolutionary tribunal during the Reign of Terror in France. --Burke. [1913 Webster]
  • 2. One who commits terrorism[2]. [PJC]