1. strange, eerie, or frightening in a way that seems unnatural or supernatural
Usage: often used in fantasy and horror contexts; literary or imaginative register

Examples

• The old mansion had an eldritch quality that made visitors uneasy.
• The creature's eldritch appearance defied all natural explanation.
• An eldritch sound echoed through the abandoned hallway.
• The author described the alien landscape in eldritch terms.
• The ritual involved eldritch symbols carved into the stone floor.
• Her eldritch laughter sent chills down his spine.