disappearance

Noun
  1. The act of leaving secretly or without explanation (synset 100054429)
  2. The event of passing out of sight (synset 107350316)
  3. Gradually ceasing to be visible (synset 100231039)
  4. Ceasing to exist (synset 107350946)
    "he regretted the disappearance of Greek from school curricula"; "what was responsible for the disappearance of the rainforest?"; "the disappearance of resistance at very low temperatures"

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