1. capable of being certified.
  2. legally committable to a mental institution.
  3. Sometimes Facetious. fit or ready for an insane asylum.
  4. uncontrollable; insane: a certifiable desire.


  1. capable of being certified
  2. fit to be certified as insane

1846, from certify + -able. Meaning “so deranged as to be certifiably insane” is recorded from 1912.


  1. That can or must be certified. Used of infectious, industrial, and other diseases that are required by law to be reported to health authorities.
  2. Relating to or being a person showing disordered behavior of sufficient gravity to justify involuntary mental hospitalization.
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