delusion

nouns

(psychology) an erroneous belief that is held in the face of evidence to the contrary
delusion, psychotic belief
is derived from
delusional
is derived from
delude
a mistaken or unfounded opinion or idea
"he has delusions of competence"; "his dreams of vast wealth are a hallucination"
delusion, hallucination
is derived from
delusional
is derived from
delude
the act of deluding; deception by creating illusory ideas
delusion, head game, illusion
is derived from
delude