The word “hallucination” comes from the Latin word alucinari, which means “to wander in the mind”. The 17th-century physician Sir Thomas Browne introduced the word into the English language in 1646. Browne defined a hallucination as a type of vision that “receives its objects erroneously” and is “depraved”. 

In natural language processing, a hallucination is defined as “generated content that appears factual but is ungrounded”. 

• Hallucination – WikipediaThe word “hallucination” itself was introduced into the English language by the 17th-century physician Sir Thomas Browne in 1646 f…Wikipedia

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