Define 'psychosis'.

Psychosis is characterized as a severe mental condition where an individual experiences a disconnection from reality. This state can manifest through various symptoms, including hallucinations (seeing or hearing things that are not present) and delusions (strongly held false beliefs), significantly impacting a person's perception of themselves and the world around them. Those experiencing psychosis may find it difficult to think clearly, manage their emotions, and interact socially, which can lead to significant distress and impaired functioning.

In contrast, the other definitions provided do not capture the complexity and severity of psychosis. Mild anxiety, obsessive thoughts, and temporary emotional disturbances are conditions that may affect mental health but do not involve the profound detachment from reality that psychosis entails. Understanding psychosis is critical for mental health professionals as they work to diagnose and treat individuals who may be navigating this challenging experience.