hallucination
//həˌluːsɪˈneɪʃən//
Noun
hallucinationSingular
hallucinationsPlural
1
An experience of perceiving something that is not present, typically as a result of a mental disorder, drug use, or sensory deprivation.
The patient reported vivid hallucinations after taking the medication.
2
A false or mistaken idea or belief; a delusion.
The idea that success comes without hard work is just a hallucination.