Simple Definition of hallucinate

from our Learner's Dictionary

hallucinate

verb

hallucinates; hallucinated; hallucinating
: to see or sense something or someone that is not really there : to have hallucinations
The patient may hallucinate if she has a fever.
His thirst caused him to hallucinate (that there was) an oasis in the desert.

Cite this Entry

“Hallucinate.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/hallucinate. Accessed 19 Jun. 2026.

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