Pronunciation: (di-mō'nē-ak", dē"mu-nī'ak), [key]
—adj. Also,de•mo•ni•a•calPronunciation: (dē"mu-nī'u-kul). [key]
1. of, pertaining to, or like a demon; demonic: demoniac laughter.
2. possessed by or as by an evil spirit; raging; frantic.
a person seemingly possessed by a demon or evil spirit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.