Eschatological \es-kuh-tl-OJ-i-kuhl\ , adjective;
1. Regarding last, or final, matters, often of a theological nature
2. Regarding any system of doctrines concerning theological endings, such as death, the Judgment, the future state, etc.
Eschatology dates to 1844 and comes from Greek eskhatos ("last, furthest, uttermost, extreme, most remote") + -ology ("discourse").
Today's word and the first definition were both taken from Dictionary.com's 'Word of the Day' for Monday, December 27
Etymologies come from the Oxford English Dictionary and/or Etymonline.com