Psychosis is a serious mental disorder that involves a failure to distinguish between internal and external reality. The affected person cannot function effectively in social life.

Psychosis is a serious mental disorder characterized by defective or lost contact with reality, often with hallucinations or delusions, causing deterioration of normal social functioning.

Psychosis is a psychological disorder which is severe enough to disrupt a person's everyday life and require institutional treatment. Apart from organic causes like brain damage it has been thought by many psychologists that a psychosis is a severe form of neurosis. More recently there has been a tendency to regard biochemical factors as being important in at least some forms of psychosis. It is characterized by a lack of contact with (other people's) reality.

Webster Dictionary Meaning

1. Psychosis
- Any vital action or activity.
- A disease of the mind; especially, a functional mental disorder, that is, one unattended with evident organic changes.
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