/ əˈpɒkəlɪps; NAmE əˈpɑːk-/ noun
1.
[ sing. , U ] the destruction of the world :
Civilization is on the brink of apocalypse.
2.
the Apocalypse [ sing. ] the end of the world, as described in the Bible
3.
[ sing. ] a situation causing very serious damage and destruction :
an environmental apocalypse
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WORD ORIGIN
Old English , via Old French and ecclesiastical Latin from Greek apokalupsis , from apokaluptein uncover, reveal, from apo- un- + kaluptein to cover.