hallucination
/həˌluːsɪˈneɪʃ(ə)n
/noun
An experience involving the apparent perception of something not present: he continued to suffer from horrific hallucinations...
- The cannabis user may have a repeat experience of a previous hallucination.
- When a person has taken acid they will experience hallucinations and delusions.
- Both dreams and hallucinations involve intensive activation of the seeking system.
Synonyms
delusion, illusion, figment of the imagination, vision, apparition, mirage, chimera, fantasy, dream, daydream;
(hallucinations) delirium, phantasmagoria
informal trip, pink elephants
literary phantasm