Psychiatric illness or diseases manifested by breakdowns in the adaptational process expressed primarily as abnormalities of thought, feeling, and behavior producing either distress or impairment of function.

Synonyms: Psychiatric Disorder, Psychiatric Disease, Mental Illness, Mental Illnesses, Behavior Disorders, Psychiatric Illnesses, Illness, Mental, Psychiatric Disorders, Psychiatric Diseases, Severe Mental Disorder, Severe Mental Disorders, Psychiatric Illness, Mental Disorders, Mental Disorder, Severe, Psychiatric Diagnosis, Diagnosis, Psychiatric, Mental Disorder, Mental Disorders, Severe