Horror belongs under a speculative fiction umbrella that also includes fantasy and science fiction, and while horror is identified by its ability to create intense feelings of terror, shock, or disgust in the audience, the genre’s aesthetic often infiltrates its sister genres.
One of the three main categories of speculative fiction, horror is a traditional genre of literature and film designed to produce a sense of dread or fear in the audience. Rooted in folk literature, horror stories can feature supernatural elements such as ghosts, witches, demons, ghouls, and monsters.
Genre is a literary term used to describe categories of fiction. You'll recognize the popular ones, which turn up as special sections at your favorite bookstore: science fiction, fantasy, romance, mystery, and horror. It's is a handy way to group similar types of stories, but genre is often misunderstood.