diminished capacity

di·min·ished capacity | \ də-ˈmi-nisht- \

Legal Definition of diminished capacity 

1 : an abnormal mental condition that renders a person unable to form the specific intent necessary for the commission of a crime (as first-degree murder) but that does not amount to insanity

called also diminished responsibility, partial insanity

— compare insanity, irresistible impulse test, m'naghten test, substantial capacity test

2a : a defense based on a claim of diminished capacity

b : the doctrine that diminished capacity may negate an element of a crime

Note: If diminished capacity is shown, negating an element of the crime with which a defendant is charged, the defendant can only be convicted of a lesser offense that does not include the element.

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