1. 1. Apocalypse (Abbr. Apoc.) Bible. The Book of Revelation.
   2. Any of a number of anonymous Jewish or Christian texts from around the second century B.C. to the second century A.D. containing prophetic or symbolic visions, especially of the imminent destruction of the world and the salvation of the righteous.
2. Great or total devastation; doom: the apocalypse of nuclear war.
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.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.