Hallucination (disambiguation)

A hallucination is a perception (when there is no stimulus, or a perception) in the absence of a stimulus.

Hallucination or Hallucinations can also be

Computing and mathematics
 Hallucination (artificial intelligence), (when an AI says something that does not have justification from training data, or) assertion by an AI that is unjustified by its training data

Drugs
 Alcoholic hallucinosis
 Hallucinogen, a class of psychoactive drugs that can make altered states of consciousness, and those have alterations in thought, mood, and perception

Literature
 "Hallucination" (short story), a 1985 science fiction short story by Isaac Asimov
 Hallucinations (book), a 2012 book by Oliver Sacks

Music
 Hallucination Recordings, a record label
 Hallucinations (Atrocity album) (1990)
 Hallucinations (David Usher album) (2003)
 Hallucinations (EP), a 2019 EP by Pvris
 "Hallucination" (Regard and Years & Years song), 2022
 "Hallucination" (Sissal song), 2025
 Hallucinations: Psychedelic Pop Nuggets from the WEA Vaults, a 2004 compilation album
 "Hallucination", a 2024 song by Stray Kids from Hop
 "Hallucinations", a 2009 single by Angels & Airwaves from Love
 "Hallucinations", a 2019 single by Pvris from Use Me
 "Hallucinations", a bebop-era composition by Bud Powell covered by many jazz musicians
 The Halluci Nation, a Canadian electronic music group formerly known as A Tribe Called Red