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 Illnesses, Mental Illness, Behavior Disorders, Psychiatric Illnesses, Illness, Mental, Psychiatric Disorders, Psychiatric Diseases, Severe Mental Disorders, Severe Mental Disorder, Psychiatric Illness, Mental Disorder, Severe, Mental Disorders, Psychiatric Diagnosis, Diagnosis, Psychiatric, Mental Disorder, Mental Disorders, Severe