psychosis

A severe mental condition in which a person loses contact with reality, experiencing hallucinations (perceiving things that aren't there) and/or delusions (firmly held false beliefs).

• psychotic/saɪˈkɒtɪk/(adj/n)精神病的/精神病患者

• psychotic episode
• drug-induced psychosis
• psychosis symptoms
• acute psychosis
• psychosis and schizophrenia

1. 1.Psychosis is not a diagnosis itself but a symptom that can arise from schizophrenia, bipolar disorder, severe depression, drug use, or even extreme sleep deprivation. (loss of reality contact)
2. 2.First-episode psychosis typically emerges in late adolescence or early adulthood, and early intervention dramatically improves long-term outcomes. (clinical onset)

• (no exact synonym — related: delirium /dɪˈlɪriəm/ involves confusion + altered consciousness; psychosis maintains consciousness)

from Greek "psyche" (mind, soul) + "-osis" (abnormal condition) — an abnormal condition of the mind