Legal Dictionary of Pakistan

not guilty by reason of insanity

1. A notguilty verdict, based on mental illness, that usu. does not release the defendant but instead results in commitment to a mental institution. 2. A criminal defendant's plea of not guilty that is based on the insanity defense. See INSANITY DEFENSE. - Also termed not guilty on the ground of insanity. - Abbr. NGRI. See INSANITY DEFENSE. 3. Common-law pleading. A defendant's plea denying both an act of trespass alleged in a plaintiff's declaration and the plaintiff's right to possess the property at issue.