apocalypse

[uh-pok-uh-lips] /əˈpɒk ə lɪps/
noun
1.
(initial capital letter) revelation (def 4).
2.
any of a class of Jewish or Christian writings that appeared from about 200 b.c. to a.d. 350 and were assumed to make revelations of the ultimate divine purpose.
3.
a prophetic revelation, especially concerning a cataclysm in which the forces of good permanently triumph over the forces of evil.
4.
any revelation or prophecy.
5.
any universal or widespread destruction or disaster:
the apocalypse of nuclear war.
Origin
1125-75; Middle English < Late Latin apocalypsis < Greek apokálypsis revelation, equivalent to apokalýp(tein) to uncover, reveal (apo- apo- + kalýptein to cover, conceal) + -sis -sis
British Dictionary definitions for apocalypse

apocalypse

/əˈpɒkəlɪps/
noun
1.
a prophetic disclosure or revelation
2.
an event of great importance, violence, etc, like the events described in the Apocalypse
Word Origin
C13: from Late Latin apocalypsis, from Greek apokalupsis, from apokaluptein to disclose, from apo- + kaluptein to hide

Apocalypse

/əˈpɒkəlɪps/
noun
1.
(Bible) (in the Vulgate and Douay versions of the Bible) the Book of Revelation
Word Origin and History for apocalypse
n.

late 14c., "revelation, disclosure," from Church Latin apocalypsis "revelation," from Greek apokalyptein "uncover, disclose, reveal," from apo- "from" (see apo-) + kalyptein "to cover, conceal" (see Calypso). The Christian end-of-the-world story is part of the revelation in John of Patmos' book "Apokalypsis" (a title rendered into English as "Apocalypse" c.1230 and "Revelations" by Wyclif c.1380).

Its general sense in Middle English was "insight, vision; hallucination;" meaning "a cataclysmic event" is modern. As agent nouns, apocalypst (1829), apocalypt (1834), and apocalyptist (1835) have been tried.

apocalypse in Culture
Apocalypse [(uh-pok-uh-lips)]

Another name for the New Testament Book of Revelation; from the Greek word for “revelation.”

Note: An “apocalypse” is a final catastrophe.
Note: The Apocalypse is supposed to come at the end of the world or of time.
apocalypse in the Bible

the Greek name of the Book of Revelation (q.v.).