Law Dictionary

mental disease

noun mental dis·ease

Legal Definition of mental disease

  1. :  an abnormal mental condition that interferes with mental or emotional processes and internal behavioral control and that is not manifest only in repeated criminal or antisocial conduct; broadly :  mental illness

Additional Notes on mental disease

Mental disease and mental illness are in general use synonymous, but mental disease has developed a settled meaning in criminal law while mental illness is often explained or defined by reference to the medical community's understanding of the term.

Seen and Heard

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feeling or affected by lethargy

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