Terror, Defined

Merriam Webster defines terror as follows:

Etymology: Middle English, from Anglo-French terrour, from Latin terror, from terrEre to frighten; akin to Greek trein to be afraid, flee, tremein to tremble...

(1) a state of intense fear;
(2) (a) one that inspires fear: scourge; (b) a frightening aspect (the terrors of invasion); (c) a cause of anxiety: worry; (d) an appalling person or thing
(3) violent or destructive acts (as bombing) committed by groups in order to intimidate a population or government into granting their demands (insurrection and revolutionary terror)