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Medical Term:

mental illness


  1. a broadly inclusive term, generally denoting one or all of the following: 1) a disease of the brain, with predominant behavioral symptoms, as in paresis or acute alcoholism; 2) a disease of the “mind” or personality, evidenced by abnormal behavior, as in hysteria or schizophrenia; also called mental or emotional disease, disturbance, or disorder, or behavior disorder;
  2. any psychiatric illness listed in Current Medical Information and Terminology of the American Medical Association or in the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Association.

See Also: behavior disorder

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.