de|mo|ni|ac

de|mo|ni|ac «dih MOH nee ak», adjective, noun.

–adj.

1. of or like demons.

2. devilish; fiendish: »

Burning people at the stake was a demoniac custom.

SYNONYM(S): diabolic, satanic.

3. Figurative. raging; frantic: »

In a demoniac fit the cat clawed the leg of the woman who kicked it.

4. possessed by an evil spirit.

–n.

a person supposed to be possessed by an evil spirit.