Source : WordNet®

day of reckoning
     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}, {Doomsday},
           {Last Judgment}, {Last Judgement}, {Last Day}, {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}, {end of the world}]