delusion

1. (psychology) an erroneous belief that is held in the face of evidence to the contrary

2. a mistaken or unfounded opinion or idea;

"he has delusions of competence"

"his dreams of vast wealth are a hallucination"

3. the act of deluding; deception by creating illusory ideas

来自delude, 欺骗。

delusion

delusion: see illusion

delusion (n.)

"act of misleading someone," early 15c.; as a form of mental derangement, 1550s, from Latin delusionem (nominative delusio) "a deceiving," noun of action from past participle stem of deludere (see delude).

Technically, delusion is a belief that, though false, has been surrendered to and accepted by the whole mind as a truth; illusion is an impression that, though false, is entertained provisionally on the recommendation of the senses or the imagination, but awaits full acceptance and may not influence action. Delusions of grandeur, the exact phrase, is recorded from 1840, though the two words were in close association for some time before that.

"I don't think the findings that we have are any evidence of personal delusion," says Epley.

2014年考研真题（英语二）阅读理解 Section Ⅱ

1. I was under the delusion that he intended to marry me.

我误认为他要娶我。

来自柯林斯例句

2. He is under the delusion that he is Napoleon.

他患了妄想症,认为自己是拿破仑.

来自《简明英汉词典》

3. He is under a delusion in this matter.

他对这事有误会.

来自《现代英汉综合大词典》

4. This was not optimism, it was delusion.

这不是乐观，这是妄想。

来自辞典例句

5. It must need be a delusion.

那不过是一种幻觉罢了.

来自英汉文学 - 红字