1. an intense feeling of fear, shock, or disgust
2. something that causes intense fear or shock
3. a genre of fiction designed to frighten or create suspense

Examples

• She watched in horror as the accident unfolded.
• The horror of war left lasting scars on the survivors.
• He loves reading horror novels late at night.
• The documentary revealed the horrors of the disaster.
• To her horror, she realized she had forgotten her passport.
• The movie was a classic horror film from the 1980s.
• The children screamed in horror at the haunted house.