"dellusion" is probably misspelled. Trying delusion instead Definition of delusion
delusion has definitions from the fields of psychology,psychiatry
1
[ noun ] (psychology,psychiatry) an erroneous belief that is held in the face of evidence to the contrary

Synonyms

psychotic_belief

2
[ noun ] the act of deluding; deception by creating illusory ideas

Synonyms

illusion head_game

3
[ noun ] a mistaken or unfounded opinion or idea

Synonyms

hallucination

Examples

"he has delusions of competence" "his dreams of vast wealth are a hallucination"

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