“The inability to distinguish between what is real and what is imaginary. Psychosis is a term used to describe a severe mental illness. Psychotics are characterized by a variety of symptoms that most people consider abnormal. These include experiencing delusions, such as the notion that one is being persecuted or conspired against. Psychotics may see things which don't actually exist and hear Voices (i.e. God) when no one is around. They often exhibit compulsive, irrational, ritualized behavior, esp. when such behavior serves no purpose or is even harmful or disruptive to those around them. They show no concern for others but may exhibit total self-centered behavior. Includes sociopathy, schizophrenia.”
DSM-IV
