Source : Webster's Revised Unabridged Dictionary (1913)

Pandemonium \Pan`de*mo"ni*um\, n. [NL., from Gr. ?, ?, all + ? a
   demon.]
   1. The great hall or council chamber of demons or evil
      spirits. --Milton.

   2. An utterly lawless, riotous place or assemblage.

Source : WordNet®

pandemonium
     n : a state of extreme confusion and disorder [syn: {chaos}, {bedlam},
          {topsy-turvydom}, {topsy-turvyness}]