apocalypse /əˈpɑːkəˌlɪps/ noun Learner's definition of APOCALYPSE
[singular]
: a great disaster : a sudden and very bad event that causes much fear, loss, or destruction大灾难
the apocalypse
: the end or destruction of the world especially as described in the Christian Bible（尤指《圣经》中描述的）世界末日