n. A personality disorder indicated by a pattern of lying, exploitation, heedlessness, arrogance, sexual promiscuity, low self-control, and lack of empathy and remorse. Violent and criminal offenses may be indicative of this disorder.
the GNU version of the Collaborative International Dictionary of English
n. Mental disease. See psychosis, 2.
The Century Dictionary and Cyclopedia
n. Derangement of the mental functions.
n. The cure of the sick by psychical influence.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. any disease of the mind; the psychological state of someone who has emotional or behavioral problems serious enough to require psychiatric intervention
Word Usage
"The word psychopathy dates back in an early form to the 19th century, but as a modern term it's primarily used in reference to the work of Canadian psychologist Robert Hare."