Noun disaster has 3 senses
  1. catastrophe, disaster - a state of extreme (usually irremediable) ruin and misfortune; "lack of funds has resulted in a catastrophe for our school system"; "his policies were a disaster"
    --1 is a kind of adversity, hardship, hard knocks
  2. calamity, catastrophe, disaster, tragedy, cataclysm - an event resulting in great loss and misfortune; "the whole city was affected by the irremediable calamity"; "the earthquake was a disaster"
    --2 is a kind of misfortune, bad luck
    --2 has particulars:
     act of God, force majeure, vis major, inevitable accident, unavoidable casualty; apocalypse; famine; kiss of death; meltdown; plague; visitation
  3. disaster - an act that has disastrous consequences
    --3 is a kind of
    destruction, devastation
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