delusion meaning and definition

DELUSION noun

Definition of delusion (noun)

1. (psychology) an erroneous belief that is held in the face of evidence to the contrary
   • synonyms: psychotic belief
2. a mistaken or unfounded opinion or idea
   • "he has delusions of competence"; "his dreams of vast wealth are a hallucination"
   • synonyms: hallucination
3. the act of deluding; deception by creating illusory ideas
   • synonyms: head game, illusion