psychosis

An acute or chronic mental state marked by loss of contact with reality, disorganized speech and behavior, and often by hallucinations or delusions, seen in certain mental illnesses, such as schizophrenia, and other medical disorders.

Mental constitution or condition.

A change in the field of consciousness.

In pathology, any mental disorder; any form of insanity.

Any vital action or activity.

A disease of the mind; especially, a functional mental disorder, that is, one unattended with evident organic changes.

A severe mental disorder, sometimes with physical damage to the brain, marked by a deranged personality and a distorted view of reality.

any severe mental disorder in which contact with reality is lost or highly distorted