disappearance - definition and synonyms

noun 

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/ˌdɪsəˈpɪərəns/
singulardisappearance
pluraldisappearances
  1. 1
    [countable/uncountable] a situation in which someone or something can no longer be found or seen

    Richards was 18 at the time of her disappearance.

  2. 2
    [uncountable] a situation in which something stops happening or existing

    the disappearance of several rare species