WordNet (r) 3.0 (2006):

end of the world
    n 1: (New Testament) day at the end of time following Armageddon
         when God will decree the fates of all individual humans
         according to the good and evil of their earthly lives [syn:
         Judgment Day, Judgement Day, Day of Judgment, Day of
         Judgement, Doomsday, Last Judgment, Last Judgement,
         Last Day, eschaton, day of reckoning, doomsday,
         crack of doom, end of the world]
    2: an unpleasant or disastrous destiny; "everyone was aware of
       the approaching doom but was helpless to avoid it"; "that's
       unfortunate but it isn't the end of the world" [syn: doom,
       doomsday, day of reckoning, end of the world]