WordReference Random House Unabridged Dictionary of American English © 2026
ter•ror•ist
(ter′ər ist),USA pronunciation n.
adj.
ter′ror•is′tic, adj.
- Governmenta person, usually a member of a group, who uses or advocates terrorism.
- Governmenta person who terrorizes or frightens others.
- Government(formerly) a member of a political group in Russia aiming at the demoralization of the government by terror.
- Governmentan agent or partisan of the revolutionary tribunal during the Reign of Terror in France.
adj.
- Governmentof, pertaining to, or characteristic of terrorism or terrorists:terrorist tactics.
- 1785–95; terror + -ist; compare French terroriste
'terroristic' also found in these entries (note: many are not synonyms or translations):