What is the meaning of Apocalypse?

A revealing, especially a prophecy of, or the unfolding of, supernatural events.

A huge disaster; a cataclysmic event; destruction or ruin of large scope and scale.

The unveiling of events prophesied in the Revelation; the second coming and the end of life on Earth; global destruction.

The Book of Revelation.

apocalypse (disaster)

ablative singular of apocalypsis

Source: wiktionary.org