Horror Films are unsettling films designed to frighten and panic, cause dread and alarm, and to invoke our hidden worst fears, often in a terrifying, shocking finale, while captivating and entertaining us at the same time in a cathartic experience. Horror films effectively center on the dark side of life, the forbidden, and strange and alarming events. They deal with our most primal nature and its fears: our nightmares, our vulnerability, our alienation, our revulsion's our terror of the unknown, our fear of death and dismemberment, loss of identity, or fear of sexuality.
Whatever dark, primitive, and revolting traits that simultaneously attract and repel us are featured in the horror genre. Horror films are often combined with science fiction when the menace or monster is related to a corruption of technology, or when Earth is threatened by aliens. The fantasy and supernatural film genres are not synonymous with the horror genre, although thriller films may have some relation when they focus on the revolting and horrible acts of the killer/madman. Horror films are also known as chillers, scary movies, spookfests, and the macabre. See also Scariest Film Moments and Scenes (illustrated) - from many of the Greatest Horror Films ever made, Best Film Death Scenes (illustrated), and Three Great Horror Film Franchises.
source:
http://www.filmsite.org/horrorfilms.html
