dooms·day /ˈdumzˌde/
 世界末日
 Dooms·day n.
 1. A day of sentence or condemnation; day of death. “My body's doomsday.”
 2. The day of the final judgment.
    I could not tell till doomsday.   --Chaucer.
 Doomsday Book. See Domesday Book.
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 Doomsday
      n 1: (New Testament) day of the Last Judgment when God will
           decree the fates of all men according to the good and
           evil of their earthly lives [syn: Judgment Day, Judgement
           Day, Day of Judgment, Day of Judgement, Last
           Judgment, Last Judgement, Last Day, day of
           reckoning, 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, day of reckoning, end of the world]