delusion

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Related to Grandiose delusion: delusional disorder, delusional, nihilistic delusion, erotomanic delusion
See: artifice, bad faith, deception, error, fallacy, false pretense, figment, hoax, insanity, lunacy, phantom, ruse, sham

DELUSION, med. jurisp. A diseased state of the mind, in which persons believe things to exist, which exist only, or in the degree they are conceived of only in their own imaginations, with a persuasion so fixed and firm, that neither evidence nor argument can convince them to the contrary.
     2. The individual is, of course, insane. For example, should a parent unjustly persist without the least ground in attributing to his daughter a course of vice, and use her with uniform unkindness, there not being the slightest pretence or color of reason for the supposition, a just inference of insanity, or delusion, would arise in the minds of a jury: because a supposition long entertained and persisted in, after argument to the contrary, and against the natural affections of a parent, suggests that he must labor under some morbid mental delusion. 3 Addams' R. 90, 91; Id. 180; Hagg. R. 27 and see Dr. Connolly's Inquiry into Insanity, 384; Ray, Med. Jur. Prel. Views., Sec. 20, p. 41, and Sec. 22, p. 47; 3 Addams, R. 79; 1 Litt. R. 371 Annales d'Hygiene Publique, tom. 3, p. 370; 8 Watts, 70; 13 Ves. 89; 1 Pow. Dev. by Jarman, 130, note Shelf. on Lun. 296; 2 Bouv. Inst. n. 2104-10.

References in periodicals archive ?
When she had grandiose delusions such as "I am an angel; therefore, I don't have a gender because angels do not have a gender" "I am superior to other people" and psychomotor agitation, she was hospitalized for one and a half month.
Persons with grandiose delusions often feel that they have been endowed with special powers and that, if allowed to exercise these powers, they could cure diseases, banish poverty, ensure world peace, or perform other extraordinary feats.
I don't have any grandiose delusions about competing against these pros.