My OED has the following,


"psychopath n.
1a person suffering from chronic mental disorder esp. with abnormal or
violent social behaviour.
2a mentally or emotionally unstable person."


IIRC you omitted the 'esp.' (presumably 'especially')from 1a and didn't

mention 2a at all.

Well my C.O.D doesn't. I would refer you to the C.O.D., 1999 edition,
p1154.
John