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Noun: deterioration  di,teer-ee-u'rey-shun
  1. Process of changing to an inferior state
    "The deterioration of the products was evident after the company changed suppliers";
    - decline in quality, declension [archaic], worsening
     
  2. A symptom of reduced quality or strength
    "The deterioration of the paint job was visible after just one year";
    - impairment

Derived forms: deteriorations

Type of: decay, decline, diminution

Encyclopedia: Deterioration