妄想

(1)a mistaken or unfounded opinion or idea; "he has delusions of competence"; "his dreams of vast wealth are a hallucination"

(2)誤った、または根拠のない意見または考え

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

(4)正反対の事実にもかかわらず誤った確信をもつこと