A horro film is a film that has elicit psychlogical occurence which can elevate ones heartbeat when they portray fear and shock. 
Scary! Do you like them? Or have a favorite?
Horror films usually often aim to evoke nightmares , fears and terror beyond the unknown. I love the movie Halloween.
Halloween is a classic! It really felt like it changed the genre. And such a young Jamie Lee Curtis in the starring role!
Supernatural is often a theme as well as the macabre.
Not so much a fan of the macabre/gory. Thrillers and supernatural and psychological are actually more frightening to me. But I haven't *purposely* sought to watch a horror movie in years.
The films of horror can overlap supernatural fiction as well as thriller genres and fantasy.