Apocalypse, in the terminology of early Jewish and Christian literature, is a revelation of hidden things revealed by God to a chosen prophet or apostle.
The term is often used to describe the written account of such a revelation.
Apocalyptic literature is of considerable importance in the history of the Judeo-Christian-Islamic beliefs and traditions, because it makes specific references to beliefs such as the resurrection of the dead, judgment day, eternal life, final judgment and perdition.
Apocalyptic beliefs predate Christianity, appear throughout other religions, and have been assimilated into contemporary secular society, especially through popular culture (see Apocalypticism).
Apocalyptic beliefs also occur in other religious systems, for example, the Hindu concept of pralay.