名詞 hallucination:

1. illusory perception; a common symptom of severe mental disorder
2. a mistaken or unfounded opinion or idea
   同義詞：delusion
3. an object perceived during a hallucinatory episode

1. Tending to induce hallucinations, delusions, or other symptoms of a psychosis. Used of a drug.
   擬精神幻覺的能引起幻覺、幻想或其它精神病癥狀的，用于藥物
2. A type of schizophrenia, usually starting at puberty, characterized by foolish mannerisms, senseless laughter, delusions, hallucinations, and regressive behavior.
   青春期癡呆一種精神分裂癥，通常始發(fā)于青春期，其特征為舉止癡呆、傻笑、妄想、幻覺以及退化的舉止
3. A temporary state of mental confusion and clouded consciousness resulting from high fever, intoxication, shock, or other causes. It is characterized by anxiety, disorientation, hallucinations, delusions, trembling, and incoherent speech.
   譫妄一種暫時(shí)精神混亂和神志不清的狀態(tài)，由高燒、酒醉、休克、震驚或其它原因?qū)е?。其癥狀是：焦慮、迷失方向、發(fā)生幻覺、妄想、顫抖和說胡話
4. A disorder characterized by sudden and uncontrollable, though often brief, attacks of deep sleep, sometimes accompanied by paralysis and hallucinations.
   嗜眠病以突然的和不由自主的，雖然通常短暫的深度睡眠發(fā)作，有時(shí)伴隨有麻痹和幻覺為特征的一種紊亂

hal.lu.ci.na.tion

n.（名詞）

False or distorted perception of objects or events with a compelling sense of their reality, usually resulting from a mental disorder or as a response to a drug.
幻覺：對(duì)于事物或事件錯(cuò)誤的或扭曲的看法，同時(shí)堅(jiān)信這些看法的真實(shí)性 ，它主要產(chǎn)生于精神錯(cuò)亂或藥物反應(yīng)
The objects or events so perceived.
由這樣的幻覺產(chǎn)生的形象或事件
A false or mistaken idea; a delusion.
錯(cuò)誤的想法；一種錯(cuò)覺

【引伸】
hallu.cina.tional 或
hallu.cina.tive
adj.（形容詞）