What's the difference between delusion and illusion?

Delusion


Definition:

  • (n.) The act of deluding; deception; a misleading of the mind.
  • (n.) The state of being deluded or misled.
  • (n.) That which is falsely or delusively believed or propagated; false belief; error in belief.

Example Sentences:

  • (1) The grand patriarch, battling dissent and delusion, coming in for another shot, a new king on the throne, an impossible future to face down.
  • (2) He continued: "There's quite a lot of complacency going on and self-delusion going on.
  • (3) Paranoid states is a term that covers a number of different disorders in which persecutory and grandiose ideas and delusions constitute a significant part of the symptoms.
  • (4) The observed psychiatric symptoms were classified into two categories: simple, including incidents of confusion alone or hallucinations with preserved insight, and complex, including delusions or chronic confusion without preserved insight.
  • (5) The idea that these problems exist on the other side of the world, and that we Australians can ignore them by sheltering comfortably in our own sequestered corner of the globe, is a fool’s delusion.” Brandis sought to reach out to Australian Muslims, saying the threat came “principally from a small number of people among us who try to justify criminal acts by perverting the meaning of Islam”.
  • (6) Of course, everyone who is not drawn in by the spectacle of a 69-year-old man with hair that clearly telegraphs its owner’s level of self-delusion and casual relationship to the truth is horrified at Trump’s ascendency in the Republican party primary.
  • (7) Schizophrenia is a severe psychiatric disorder characterized by onset in young adulthood, the occurrence of hallucinations and delusions, and the development of enduring psychosocial disability.
  • (8) The following differential signs were underlined: initial symptoms, such as rudimentary cenesthopathia, stable insomnia, etc., preceding the formation of delusions; appearance of episodic exacerbations in the form of short-time acute paranoiac states; a combination of paranoiac delusion with stable phasic affective disorders; unusual possession of delusional patients expressed in bizarre delusional behaviour, etc.
  • (9) Delusions have traditionally been regarded as unmodifiable false beliefs.
  • (10) To use a slightly dodgy analogy, standing one's moral ground in the midst of free-market capitalism might be a delusion akin to the idea of Socialism In One Country: if you believe in the usual left-liberal bundle of causes, politics is probably the best arena to pursue them, rather than fixating on what you do with your money.
  • (11) Upon his admission to Broadmoor in 1995, Napper had a number of delusions and thought people were out to get him.
  • (12) Although delusion remains one of the basic problems in psychopathology, attempts to understand its pathogenesis have been dominated by unsubstantiated speculation.
  • (13) The clinical picture is near-monthly recurrence of episodes of stupor or excitement lasting about 1 or 2 weeks, which are accompanied by delusion and in some cases also by hallucinations or confusion.
  • (14) Advantages of this definition are discussed and a distinction between delusions (about external reality) and certain actual experiences (happening in the patient's mind) is proposed.
  • (15) Delusions are common in the early phase of the disease.
  • (16) They are two separate creatures with very different structures, more like a virus and a host: co-dependent but each with delusions about who is the superior form of life.
  • (17) This for me is a time for mild pre- Christmas nausea, caused by the annual destruction of a persistent adult delusion, instilled during schooldays, that this is a time for gradually relaxing and then having literally nothing to do for the week leading up to Christmas Day.
  • (18) Journalists, media types, and the delusive Edinburgh Comedy festival are complicit in supporting a broken system.
  • (19) In my defence, this has nothing to do with delusions of sophistication (though it would be about time).
  • (20) Variations in MAO activity were not significantly associated with the 65 clinical variables analyzed, although there was a tendency for patients in the low-MAO group to have more severely impaired reality testing, more paranoid and grandiose delusions, better prognostic scores, and less restlessness.

Illusion


Definition:

  • (n.) An unreal image presented to the bodily or mental vision; a deceptive appearance; a false show; mockery; hallucination.
  • (n.) Hence: Anything agreeably fascinating and charning; enchantment; witchery; glamour.
  • (n.) A sensation originated by some external object, but so modified as in any way to lead to an erroneous perception; as when the rolling of a wagon is mistaken for thunder.
  • (n.) A plain, delicate lace, usually of silk, used for veils, scarfs, dresses, etc.

Example Sentences:

  • (1) By using various colors, it is possible to tattoo a nipple-areola complex onto the breast that will have an illusion of projection.
  • (2) Apnea monitoring did not prevent, and in fact perpetrated the illusion of SIDS in this infant.
  • (3) Pope Francis’s no-longer-secret meeting in Washington DC with anti-gay activist Kim Davis, the controversial Kentucky county clerk who was briefly jailed over her refusal to issue same-sex marriage licenses in compliance with state law, leaves LGBT people with no illusions about the Pope’s stance on equal rights for us, despite his call for inclusiveness.
  • (4) Cocaine produces simple hallucinations, PCP can produce complex hallucinations analogous to a paranoid psychosis, while LSD produces a combination of hallucinations, pseudohallucinations and illusions.
  • (5) They must be kept secret because publication would destroy the illusion of a royal neutrality no one in power thinks exists any more.
  • (6) They impose the illusion of order on a chaotic life; they cement our place within and commitment to a collective.
  • (7) The preliminary experiments described here suggest that tilt aftereffects and illusions induced by projected slides of tilted real-object scenes have angular functions similar to that induced by a line grating.
  • (8) These variants, which yielded a robust illusion, included dihedral angles in place of the arrowheads of the classical pattern.
  • (9) During vibration of the depressor muscles with the mandible in its rest position the subjects underestimated an opening movement, but fixation of the mandible caused no illusions of movement.
  • (10) Stimuli were circular beams of light projected on screens (Delboef type of illusion).
  • (11) The director John Hillcoat and I were under no illusions.
  • (12) When the shaft is shortened and reaches neither of the vertices of the two pairs of wings, a reversed Müller-Lyer illusion is observed: a shaft between inward-pointing wings appears to be longer than a shaft between the outward-pointing wings.
  • (13) An illusion is something done one way that looks the other, like if you put a mirror in front of a pencil so the pencil looks like it's somewhere else.
  • (14) The subjects were asked to relate dreams, thoughts, or other mental illusions experienced during G-LOC episodes.
  • (15) While Yarmolenko stayed quiet, Stepanenko left no illusions as to his interpretation.
  • (16) The count of publications on geometric-optical illusions and the bibliography of extant books on the topic are brought up to date.
  • (17) The illusion is of watching a prima ballerina dancing only for you.
  • (18) Is Sisi’s UK visit going to fill my car with gas?’ A lot of people are increasingly disenchanted with the government, simply because it is failing to live up to its own illusions of grandeur.” Among the disenchanted are thousands of workers in the critical textiles sector who are striking over pay and conditions.
  • (19) Four experiments were conducted to investigate the role of "large" squares on the occurrence of assimilation and contrast in the Baldwin illusion.
  • (20) It creates a dangerous illusion that simply by reducing sugar intake, one can eradicate obesity.