: a wild uproar (as because of anger or excitement in a crowd of people)
Pandemonium erupted in the courtroom when the verdict was announced.
The game is stopped on account of pandemonium: players and spectators are screaming and staggering around the court … Darcy Frey
also: a chaotic situation
It is obvious that pandemonium would exist at most uncontrolled airports if every pilot did not conscientiously follow the traffic pattern. Joseph W. Benkert
2
capitalized: the capital of Hell in Milton's Paradise Lost
pan- + Late Latin daemonium "evil spirit," borrowed from Greek daimónion "evil spirit," earlier "divine power, inferior divine being," derivative of daímōn "divinity, divine power, individual destiny" (with -ium probably to be read as Latin -ium or Greek -eion, suffixes of place) — more at demon