delusion

Definition of Delusion in English :

1. delusion, psychotic belief

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

2. delusion, hallucination

a mistaken or unfounded opinion or idea

Example Sentences:
'he has delusions of competence'
'his dreams of vast wealth are a hallucination'

3. delusion, head game, illusion

the act of deluding; deception by creating illusory ideas

WordNet Lexical Database for English. Princeton University. 2010.

Delusion

noun

1.

a mistaken or misleading opinion, idea, belief, etc

he has delusions of grandeur

2. psychiatry

a belief held in the face of evidence to the contrary, that is resistant to all reason

noun

1.

a deluding or being deluded

2.

a false belief or opinion

3. Psychiatry

a false, persistent belief maintained in spite of evidence to the contrary

n.

1.

a. The act or process of deluding.

b. The state of being deluded.

2.

a. A false belief or opinion: labored under the delusion that success was at hand.

b. Psychiatry A false belief or perception that is a manifestation of a mental illness: delusions of persecution.