(parapsychology) The movement of physical systems and objects by the use of psychic power. Abbreviated as PK.

(psychoanalysis) Of or relating to psychoanalysis.

Someone who practices psychotherapy.

A person with a personality disorder indicated by a pattern of lying, cunning, manipulating, glibness, exploiting, heedlessness, arrogance, delusions of grandeur, sexual promiscuity, low self-control, disregard for morality, lack of acceptance of responsibility, callousness, and lack of empathy and remorse. Such an individual may be especially prone to violent and criminal offenses.

Exhibiting the behaviors and personality traits of a psychopath.

(dated) A psychopath.

The scientific study of all the psychological interactions between humans and the world of sound; includes the perception and production of speech.

(psychiatry) Originating from or caused by state of mind; having a psychological rather than a physiological cause.

(psychology) The advocacy of one course of action in such a way as to persuade someone to take an opposite course

In a psychotic manner. / As a result of psychosis.