Eschatology i/ˌɛskəˈtɒlədʒi/ is a part of theology concerned with the final events of history, or the ultimate destiny of humanity. This concept is commonly referred to as the "end of the world" or "end time".
The word arises from the Greek eschatos meaning "last" and -logy meaning "the study of", first used in English around 1844. The Oxford English Dictionary defines eschatology as "The part of theology concerned with death, judgment, and the final destiny of the soul and of humankind."
In the context of mysticism, the phrase refers metaphorically to the end of ordinary reality and reunion with the Divine. In many religions it is taught as an existing future event prophesied in sacred texts or folklore. More broadly, eschatology may encompass related concepts such as the Messiah or Messianic Age, the end time, and the end of days.