decay - definition and synonyms

verb [intransitive] 

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present tense
present participledecaying
past tensedecayed
past participledecayed
  1. 1
    to be gradually destroyed as a result of a natural process of change

    As dead plants decay, they release mineral salts into the soil.

  2. 2
    if a building or an area decays, its state gradually gets worse because it has not been looked after