The article deals with the etymology of the word "hallucination". The origin of the word derives from the Latin verb "alucinari", which means to wander in the mind. The word "hallucinate" first appeared in English in 1604 in Robert Cawdrey's dictionary. Cawdrey defined "hallucinate" as "to deceive or blind". Later, the word appeared in Henry Cockeram's dictionary in 1623, again meaning "to lie". The article traces the development of the word "hallucinate" in early English dictionaries.