The term apocalypse is also defined as a cosmic cataclysm in which God destroys the ruling powers of evil which is based on a prophetic disclosure or a revelation.
2. The last book of the New Testament in the Bible which contains visionary descriptions of heaven and of conflicts between good and evil and of the end of the world; attributed to John the apostle.
3. 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.
4. A great or total devastation; doom; such as, the apocalypse of nuclear war.
5. Etymology: "revelation, disclosure", from Catholic-Church Latin apocalypsis, "revelation"; from Greek apokalupsis, a derivative of the verb apokalyptein, "to uncover"; from apo-, "away, off" + kalyptein, "to cover, to conceal".
The Four Horsemen are used to describe people or other agents that can result in imminent catastrophe.