mental illness

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mental illness (countable and uncountable, plural mental illnesses)

  1. (uncountable, psychology) The property of being mentally ill; mental disorders taken as a whole.
    • 2006, R. Keith Sawyer, Explaining Creativity: The Science of Human Innovation,[1] Oxford University Press US, ISBN 9780195161649, page 87:
      Such studies show that geniuses are not any more likely to suffer from mental illness than the rest of us.
  2. (countable, psychology) A mental disorder.
    • 2002, Vikram Patel, Where There is No Psychiatrist: A Mental Health Care Manual,[2] RCPsych Publications ISBN 978-1-901242-75-1, page 70:
      Epilepsy is not a mental illness. It is caused by electrical changes in the brain.