The Collaborative International Dictionary of English v.0.48:
Horror \Hor"ror\, n. [Formerly written horrour.] [L. horror, fr.
horrere to bristle, to shiver, to tremble with cold or dread,
to be dreadful or terrible; cf. Skr. h?sh to bristle.]
1. A bristling up; a rising into roughness; tumultuous
Such fresh horror as you see driven through the
wrinkled waves. --Chapman.
2. A shaking, shivering, or shuddering, as in the cold fit
which precedes a fever; in old medical writings, a chill
of less severity than a rigor, and more marked than an
3. A painful emotion of fear, dread, and abhorrence; a
shuddering with terror and detestation; the feeling
inspired by something frightful and shocking.
How could this, in the sight of heaven, without
horrors of conscience be uttered? --Milton.
4. That which excites horror or dread, or is horrible; gloom;
Breathes a browner horror on the woods. --Pope.
The horrors, delirium tremens. [Colloq.]