Definitions
1.AdjectiveOf or relating to an apocalypse:
Revelatory; prophetic.
Catastrophic; disastrous.
2.AdjectiveRevelatory; prophetic.
3.AdjectiveCatastrophic; disastrous.
4.AdjectivePortending a future apocalypse (disaster, devastation, or doom).
5.AdjectiveCatachresis for apoplectic."He was apocalyptically furious."
6.NounOne who predicts apocalypse.