apocalypse Look up apocalypse at Dictionary.com late 14c., "revelation, disclosure," from Church L. apocalypsis "revelation," from Gk. apokalyptein "uncover, disclose, reveal," from apo- "from" (see apo-) + kalyptein "to cover, conceal" (see Calypso). The Christian end-of-the-world story is part of the revelation in John of Patmos' book "Apokalypsis" (a title rendered into English as "Apocalypse" c.1230 and "Revelations" by Wyclif c.1380). Its general sense in M.E. was "insight, vision; hallucination;" meaning "a cataclysmic event" is modern. As agent nouns, apocalypst (1829), apocalypt (1834), and apocalyptist (1835) have been tried.
This is the band Apocalyptica, starting out as a Metallica tribute band from Finland, I never learned their music until recently. In fact, it was not until I discovered them that I realized an appreciation for Metallica's music in general. Here are the four playing Nothing Else Matters.