hallucinated

3 definitions • 5 examples

past simple and past participle of

to seem to see, hear, feel, or smell something that does not exist, usually because of a health condition or because you have taken a drug:

He hadn't slept for several days and was hallucinating through exhaustion and dehydration.

He began hallucinating and hearing voices.

She hallucinated a person talking to her when no one was there.

When an artificial intelligence (= a computer system that has some of the qualities that the human brain has, such as the ability to produce language in a way that seems human) hallucinates, it produces false information:

LLMs are notorious for hallucinating – generating completely false answers, often supported by fictitious citations.

The latest version of the chatbot is greatly improved but it will still hallucinate facts.