mental illness
Defined in 2 dictionaries — Case Law, U.S. Code
Definitions from Case Law
United States Supreme Court
mental disease to such extent that a person so afflicted requires care and treatment for his own welfare, or the welfare of others, or of the community.
Defined by the Supreme Court in Humphrey v. O Cady, 405 U.S. 504 (1972).
United States Code
34 U.S.C. § 10472 — in this subchapter
the term "mental illness" means a diagnosable mental, behavioral, or emotional disorder—
(A) of sufficient duration to meet diagnostic criteria within the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association; and
(B) that has resulted in functional impairment that substantially interferes with or limits 1 or more major life activities;
34 U.S.C. § 10651 — in this section
The terms "mental illness" and "mental health disorder" mean a diagnosable mental, behavioral, or emotional disorder—
(A) of sufficient duration to meet diagnostic criteria within the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association; and
(B) (i) that, in the case of an adult, has resulted in functional impairment that substantially interferes with or limits 1 or more major life activities; or
(ii) that, in the case of a juvenile, has resulted in functional impairment that substantially interferes with or limits the juvenile's role or functioning in family, school, or community activities.
42 U.S.C. § 3796II — in this subchapter (2 versions over time)
the term “mental illness” means a diagnosable mental, behavioral, or emotional disorder—
(A) of sufficient duration to meet diagnostic criteria within the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association; and
(B) that has resulted in functional impairment that substantially interferes with or limits 1 or more major life activities;
42 U.S.C. § 3797AA — in this section (2 versions over time)
The terms “mental illness” and “mental health disorder” mean a diagnosable mental, behavioral, or emotional disorder—
(A) of sufficient duration to meet diagnostic criteria within the most recent edition of the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association; and
(B)
(i) that, in the case of an adult, has resulted in functional impairment that substantially interferes with or limits 1 or more major life activities; or
(ii) that, in the case of a juvenile, has resulted in functional impairment that substantially interferes with or limits the juvenile’s role or functioning in family, school, or community activities.