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Noun: deficiency  di'fi-shun(t)-see
  1. The state of needing something that is absent or unavailable
    "water is the critical deficiency in desert regions";
    - lack, want
  2. Lack of an adequate quantity or number
    "the deficiency of unemployment benefits";
    - insufficiency, inadequacy

Derived forms: deficiencies

Type of: amount, demand, need

Antonym: sufficiency

Encyclopedia: Deficiency