adj.
- Suggestive of or afflicted with insanity: a maniacal frenzy.
- Characterized by excessive enthusiasm or excitement: a maniacal interest in gambling.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.