noun
1. : a disorder of behavior toward other individuals or toward society in which reality is usually clearly perceived except for an individual's social responsibilities or moral obligations, which is often manifested hedonistically (as by criminal acts, drug addiction, sexual perversion, or activity leading to immediate personal gratification especially when it is believed that punishment can be avoided), by passive indifference (as by shiftlessness, untrustworthiness, or vagabondism), or in contrast by fanatical pseudosocial zealousness, and which is usually a more or less permanent way of life refractory to treatment and hence often considered a constitutional disorder
2. : an individual having a psychopathic personality