1. relating to or characteristic of demons; evil or fiendish
2. showing extreme wildness or frenzy

1. a person believed to be possessed by demons
Usage: archaic

Examples

• The villain’s demoniac laughter echoed through the castle.
• She worked with demoniac energy to finish the project on time.
• The storm raged with demoniac fury throughout the night.
• His demoniac behavior frightened the other children.
• The ancient text described the exorcism of a demoniac.
• The artist’s demoniac intensity was evident in every brushstroke.