Webster's Revised Unabridged Dictionary · 1913

Terror

Terror , noun

[Latin terror, akin to terrere to frighten, for tersere; akin to Greek {not transcribed} to flee away, dread, Sanskrit tras to tremble, to be afraid, Russ. triasti to shake: compare French terreur. Compare Deter.]

1.
Extreme fear; fear that agitates body and mind; violent dread; fright.
Terror seized the rebel host. — Milton
2.
That which excites dread; a cause of extreme fear.
Those enormous terrors of the Nile. — Prior
Rulers are not a terror to good works. — Rom. xiii. 3
There is no terror, Cassius, in your threats. — Shakespeare

Terror is used in the formation of compounds which are generally self-explaining: as, terror-fraught, terror-giving, terror-smitten, terror-stricken, terror-struck, and the like.

Collocations (2)
King of terrors , death. — Job xviii. 14
Reign of Terror (French Hist.) , See in Dictionary of Noted Names in Fiction.