Find the word definition

Crossword clues for hallucination

Longman Dictionary of Contemporary English
▪ Doctors believe the medication was the cause of her hallucinations.
▪ I knew that what I had seen was a hallucination, but it was so real and frightening.
▪ I suffered horrendous hallucinations and flashbacks, and quit using LSD.
▪ In tests, the drug caused patients to have hallucinations.
▪ Jamie lost two and a half stone in the next fortnight, couldn't eat and had hallucinations.
▪ As she shoveled, the cries grew too loud to be passed off as wishful hallucinations.
▪ But the heat was more seen than felt, more hallucination than discomfort.
▪ Causes stupor, hallucinations, vomiting.
▪ Close supervision of patients is needed when they have delusions or hallucinations concerning the baby.
▪ Persinger has suggested that these reports might be hallucinations instilled into the witnesses by the effect of ionising radiation in close proximity.
▪ Sometimes the hallucinations associated with small seizures in the temporal lobe have characteristics suggestive of schizophrenic thought, especially paranoia.
▪ Stanley said he had flashbacks and hallucinations for several years after he left Edgewood and returned to duty at Fort Knox.
▪ This would be the case if indeed the events were involuntary hallucinations.
The Collaborative International Dictionary

Hallucination \Hal*lu`ci*na"tion\ (-n[=a]"sh[u^]n), n. [L. hallucinatio: cf. F. hallucination.]

  1. The act of hallucinating; a wandering of the mind; error; mistake; a blunder.

    This must have been the hallucination of the transcriber.

  2. (Med.) The perception of objects which have no reality, or of sensations which have no corresponding external cause, arising from disorder of the nervous system, as in delirium tremens; delusion.

    Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity.
    --W. A. Hammond.

Douglas Harper's Etymology Dictionary

in the pathological/psychological sense of "seeing or hearing something which is not there," 1640s, from Latin hallucinationem (nominative hallucinatio), from past participle stem of hallucinari (see hallucinate). Hallucination is distinct from illusion in not necessarily involving a false belief. Related: Hallucinations.


n. 1 A sensory perception of something that does not exist, often arising from disorder of the nervous system, as in delirium tremens; a delusion. 2 The act of hallucinating; a wandering of the mind; an error, mistake or blunder.

  1. n. illusory perception; a common symptom of severe mental disorder

  2. a mistaken or unfounded opinion or idea; "he has delusions of competence"; "his dreams of vast wealth are a hallucination" [syn: delusion]

  3. an object perceived during a hallucinatory episode; "he refused to believe that the angel was a hallucination"


A hallucination is a perception in the absence of external stimulus that has qualities of real perception. Hallucinations are vivid, substantial, and are perceived to be located in external objective space. They are distinguishable from these related phenomena: dreaming, which does not involve wakefulness; illusion, which involves distorted or misinterpreted real perception; imagery, which does not mimic real perception and is under voluntary control; and pseudohallucination, which does not mimic real perception, but is not under voluntary control. Hallucinations also differ from " delusional perceptions", in which a correctly sensed and interpreted stimulus (i.e., a real perception) is given some additional (and typically absurd) significance.

Hallucinations can occur in any sensory modality— visual, auditory, olfactory, gustatory, tactile, proprioceptive, equilibrioceptive, nociceptive, thermoceptive and chronoceptive.

A mild form of hallucination is known as a disturbance, and can occur in most of the senses above. These may be things like seeing movement in peripheral vision, or hearing faint noises and/or voices. Auditory hallucinations are very common in schizophrenia. They may be benevolent (telling the subject good things about themselves) or malicious, cursing the subject etc. Auditory hallucinations of the malicious type are frequently heard, for example people talking about the subject behind his/her back. Like auditory hallucinations, the source of the visual counterpart can also be behind the subject's back. Their visual counterpart is the feeling of being looked or stared at, usually with malicious intent. Frequently, auditory hallucinations and their visual counterpart are experienced by the subject together.

Hypnagogic hallucinations and hypnopompic hallucinations are considered normal phenomena. Hypnagogic hallucinations can occur as one is falling asleep and hypnopompic hallucinations occur when one is waking up. Hallucinations can be associated with drug use (particularly deliriants), sleep deprivation, psychosis, neurological disorders, and delirium tremens.

The word "hallucination" itself was introduced into the English language by the 17th century physician Sir Thomas Browne in 1646 from the derivation of the Latin word alucinari meaning to wander in the mind.

Hallucination (short story)

"Hallucination" is a science fiction short story by American writer Isaac Asimov. It first appeared in Boys' Life in 1985, and was collected in Gold. Its storyline is similar to that of his novel Nemesis.

Hallucination (disambiguation)

A hallucination is a perception in the absence of a stimulus.

Hallucination may also refer to:

  • "Hallucination" (short story), a 1985 science fiction short story by Isaac Asimov
  • Hallucination Recordings, a record label

Hallucinations may also refer to:

  • Hallucinations (book), a 2012 book by Oliver Sacks
  • Hallucinations (Atrocity album), 1990
  • Hallucinations (David Usher album), 2003
  • Hallucinations: Psychedelic Pop Nuggets from the WEA Vaults, a 2004 compilation album
  • "Hallucinations", a 2009 single by Angels & Airwaves from Love
  • "Hallucinations", a bebop-era composition by Bud Powell covered by many jazz musicians

Usage examples of "hallucination".

Since being brought in he had gone over the scene again and again, and was slowly convincing himself that it had been a hallucination.

Everything that happened can be explained in terms of autosuggestion and collective hallucination.

When the grayness touched the face and the backs of the hands, the creature became a feverish night wanderer, subject to strange hallucinations and delusions and desires.

The hallucination of Barbas disappears and Phoebe sees Paige lying there unconscious.

A film of reflected street-lighting shimmered over the whole scene, closing the eyes of modern Cairenes to the wonder of the stars but at the same time creating the hallucination of a fairyland illuminated in greens and reds and blues and sulphurous yellows.

The possibility that serotonin in excess produces schizophrenia is greatly weakened, nevertheless, by the fact that a compound very closely related to lysergic acid diethylamide interferes with serotonin oxidation even more and yet produces no hallucinations.

A less zealous, optimistic and dogged individual than he would not have even supposed that, so years after the Hearts had emigrated east from Vegas, that city of all American cities phantasmagoric and insubstantial as a delirium hallucination, there could be any trace, any vestigial memory of them.

These sounds and scents had neither the dreamlike insubstantiality nor the hyperrealistic intensity that she might have expected of hallucinations, but were of a vividness precisely matched to the elements of the night that she knew to be real: neither more nor less resonant than the grumble and swish of passing traffic, neither more nor less sweet-smelling than the traffic fumes were odorous.

It is probably more usual for it to take place in the so-called hypnoidal state in which one is awaiting sleep, and it is closely associated with those hypnagogic images which have some of the sensory solidity of hallucinations.

Then, the split second change, bliss striking and cold snapping, leaving the exposed victim giddy and warm with hypothermic madness, chasing hallucinations.

The Lissajous pulsations became hallucinations in the sex organs of the computer.

Canadian neurophysiologist Wilder Penfield that electrical stimulation of certain regions of the brain elicits full-blown hallucinations.

Was this cult the foundation for Orphism and were the trances and hallucinations induced by drugs the mechanism whereby the Greeks conceived the idea of the soul and, associated with it, reincarnation?

Dust from the spinout swirled outside the windows of the rocking car, but she could see well enough to know that it had been a hallucination.

The Vital is a world full of lustre and colour and hallucination which try to ape the Supramental movements.