delusion of negation

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a false belief that is firmly maintained in spite of incontrovertible and obvious proof to the contrary and in spite of the fact that other members of the culture do not share the belief. adj., adj delu´sional.
bizarre delusion one that is patently absurd, with no possible basis in fact.
delusion of control the delusion that one's thoughts, feelings, and actions are not one's own but are being imposed by someone else or some other external force.
depressive delusion a delusion that is congruent with a predominant depressed mood, such as a delusion of serious illness, poverty, or spousal infidelity.
erotomanic delusion a delusional conviction that some other person, usually of higher status and often famous, is in love with the individual; it is one of the subtypes of delusional disorder.
fragmentary d's unconnected delusions not organized around a coherent theme.
delusion of grandeur (grandiose delusion) delusional conviction of one's own importance, power, or knowledge, or that one is, or has a special relationship with, a deity or a famous person. It is one of the subtypes of delusional disorder.
delusion of jealousy a delusional belief that one's spouse or lover is unfaithful, based on erroneous inferences drawn from innocent events imagined to be evidence and often resulting in confrontation with the accused. It is one of the subtypes of delusional disorder.
mixed delusion one in which no central theme predominates. It is one of the subtypes of delusional disorder.
delusion of negation (nihilistic delusion) a depressive delusion that the self, part of the self, part of the body, other persons, or the whole world has ceased to exist.
paranoid d's an older term for delusion of grandeur and delusion of persecution; its use is discouraged.
delusion of persecution a delusion that one is being attacked, harassed, cheated, persecuted, or conspired against. It is one of the subtypes of delusional disorder.
delusion of reference a delusional conviction that ordinary events, objects, or behaviors of others have particular and unusual meanings specifically for oneself.
somatic delusion a delusion that there is some alteration in a bodily organ or its function. It is one of the subtypes of delusional disorder.
systematized d's a group of delusions organized around a common theme; typical of delusional disorders or paranoid schizophrenia.

de·lu·sion of ne·ga·tion

a delusion in which one imagines that the world and all that relates to it have ceased to exist.
Synonym(s): nihilistic delusion

de·lu·sion of ne·ga·tion

(dĕ-lū'zhŭn nĕ-gāshŭn)
A delusion in which one imagines that the world and all that relates to it have ceased to exist.


(di-loo'zhon) [L. deludere, to cheat]
A false belief without appropriate external stimulation and inconsistent with the individual's own knowledge and experience. It is seen most often in psychoses, in which patients may not be able to distinguish their own unverified thoughts, fears, or feelings from reality. It differs from hallucination in that the latter involves the false excitation of one or more senses. The most serious delusions are those that cause patients to harm others or themselves, e.g., fear of being poisoned may cause the patient to refuse food. Delusions may lead to suicide or self-injury. False beliefs include being persecuted or being guilty of an unpardonable sin. See: hallucination; illusion

antichrist delusion

The psychotic belief that other people are devils. Patients with this delusion often react violently to those whom they suspect of being demonic.

delusion of control

A delusion that one's thoughts and actions are under the control of an external force.

depressive delusion

A delusion causing a saddened state.

expansive delusion

Delusion of grandeur.

fixed delusion

A delusion that remains unaltered.

delusion of grandeur

An unreasonable conviction of one's own power, importance, or wealth, accompanied by a feeling of well-being, seen in manic patients. Synonym: expansive delusion; megalomania

delusion of negation

Nihilistic delusion.

nihilistic delusion

A delusion that everything has ceased to exist. Synonym: delusion of negation

delusion of persecution

A delusion in which patients believe people or agencies are seeking to injure or harass them.

reference delusion

A delusion that causes the patient to read an unintended meaning into the acts or words of others. Usually the affected person interprets comments about others as being directed toward himself or herself and as being belittling or disparaging.

delusion of substitution

Capgras syndrome.

systematized delusion

A logical correlation made by a person, based on a false premise, false reasoning, or an incorrect deduction.

unsystematized delusion

A delusion with no correlation between ideas and actual conditions.