Is Clinically Insane a Word?

Insanity is no longer considered a medical diagnosis but is a legal term in the United States, stemming from its original use in common law.

What does clinically insane mean?

n. mental illness of such a severe nature that a person cannot distinguish fantasy from reality, cannot conduct her/his affairs due to psychosis, or is subject to uncontrollable impulsive behavior.

How can you be clinically insane?

According to this test, a person is considered legally insane if, at the time of the offense, he or she suffered from a defect of reason from a disease of the mind. Due to this mental disease, the defendant did not know that what he or she was doing was illegal or wrong.