The definition of a hallucination is something that someone sees or imagines that is not really there.
An example of a hallucination is a vision of a pool in a hot desert.
- the apparent perception of sights, sounds, etc. that are not actually present: it may occur in certain mental disorders
- the imaginary object apparently seen, heard, etc.
Origin of hallucinationClassical Latin hallucinatio from hallucinari: see hallucinate
- a. Perception of visual, auditory, tactile, olfactory, or gustatory stimuli in the absence of any external objects or events and with a compelling sense of their reality, resulting from certain mental and physical disorders or as a response to a drug.b. The objects or events so perceived.
- A false or mistaken idea.
- hal·lu′ci·na′tion·al hal·lu′ci·na′tive