| 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. |
| 5. | of, pertaining to, or characteristic of terrorism or terrorists: terrorist tactics. |