Wordnet 3.0
NOUN (1)
1.
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;
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
terrorist
n 1: 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