eschatology
     n : the branch of theology that is concerned with such final
         things as death and judgment; heaven and hell; the end of
         the world

Eschatology \Es`cha*tol"o*gy\, n. [Gr. ? the furthest, last +
   -logy.]
   The doctrine of the last or final things, as death, judgment,
   and the events therewith connected.