Definition of "hallucinate"

hallucinate

/həˈluːsɪneɪt/

verb
third-person singular simple present hallucinates, present participle hallucinating, simple past and past participle hallucinated
1. (transitive, intransitive) To seem to perceive things (with one or more of one's senses) which are not really present; to have visions; to experience a hallucination.
2. (artificial intelligence, of a model) To produce factually invalid information; to interpolate.
  Quotations
  Despite maintaining plausible general linguistic capabilities, dialogue models are still unable to fully discern facts and may instead hallucinate factually invalid information.
  2021 September 14, Nouha Dziri, Andrea Madotto, Osmar Zaiane, Avishek Joey Bose, “Neural Path Hunter: Reducing Hallucination in Dialogue Systems via Path Grounding”, in arXiv:2104.08455 [cs]‎