a ‧ poc ‧ a ‧ lypse /əˈpɒkəlɪps $ əˈpɑː-/ BrE AmE noun [countable]
[ Date: 1200-1300 ; Language: Late Latin ; Origin: apocalypsis , from Greek , from apokalyptein 'to uncover' , from apo- 'away from, off' + kalyptein 'to cover' ]
1 . the apocalypse the destruction and end of the world:
anti-nuclear protesters who fear the apocalypse
2 . a situation in which a lot of people die or suffer, and a lot of damage is done:
A lot of investors now fear a stock market apocalypse.