adjective pan·de·mo·ni·ac \¦pandə¦mōnēˌak\
variants: less commonly


\-mänik\ or



Definition of pandemoniac

  1. 1 :  of or relating to or resembling Pandemonium :  infernal

  2. 2 :  having the character of a pandemonium :  riotous several hundred thousand hysterical … youths roaring pandemoniac approval — J. A. Morris, born 1904

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of pandemoniac

pandemonium + -ac (after demoniac) or -ic (after demonic) or -acal (after demoniacal)

Seen and Heard

What made you want to look up pandemoniac? Please tell us where you read or heard it (including the quote, if possible).


a trip made at another's expense

Get Word of the Day daily email!