a·poc·a·lypse 
(ə-pŏkə-lĭps′)
(ə-pŏkə-lĭps′)n.
1.
a. Apocalypse Abbr. Apoc. Bible The Book of Revelation.
b. Any of a number of anonymous Jewish or Christian texts from around the second century BC to the second century AD containing prophetic or symbolic visions, especially of the imminent destruction of the world and the salvation of the righteous.
2.
a. The end of the world, especially as described in one of these texts.
b. A great catastrophe that results in widespread destruction or the collapse of civilization: "The United States was calling in air strikes and heavy armor until we had the feeling that the whole thing was going to end in apocalypse" (Phillip Robertson).
3. A prophetic disclosure; a revelation.
[Middle English Apocalipse, from Late Latin Apocalypsis, from Greek apokalupsis, revelation, Apocalypse, from apokaluptein, to uncover : apo-, apo- + kaluptein, to cover; see kel-1 in the Appendix of Indo-European roots.]