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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.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in periodicals archive ?
Delusions of grandeur were an organic by-product of this manufactured belief.
Delusion of control has different names, including delusion of passivity, passivity experience, and passivity phenomenon.
The comparison gave the level of delusion each person lived in.
The delusion of other persons are stealing was the most common (35.3%), followed by delusions of self is in danger (21.3%), house is not his/her home (10.8%), spouse is having an affair (7.2%), family plans to abandon him/her (4.8%), an unwelcome guest is living in the house (2.9%), media persons are in the house (2.9%), and others are not who they claim (1.0%).
Here, I will describe some of the work and theorizing on belief ad delusion and the palliative function they may both serve with regard to minimizing uncertainty.
Reduced autonomic responses to faces in Capgras delusion. Proc Biol Sci.
After the last 5 years of shared delusion, and acting to protect themselves, the patient and father covered all the windows with towels and paper.
The first part of the book includes six chapters the follow the road to psychosis and the evolution of delusion from its germinal stage to depersonalization and transpersonalization.
For cases of primary delusional infestation, the goal generally is to decrease the patient's preoccupation with the delusion and to improve social and occupational functions.
Summary: Delusion has always been a central topic for psychiatric research with regard to its etiology, pathogenesis, diagnosis, treatment, and forensic relevance.
In the pantheon of fascinating psychological disorders, the Cotard Delusion is one of the most bizarre you can imagine -- and it is not even one of those hip and fashionable ones usually associated with music celebrities or dieting.
The author concludes that if we really want relationships which overcome the problems of power and gender polarisation, we must see romantic love for what it is--a delusion which can implicate lovers in the repeated destruction of their own happiness.