Hallucination (from Latin alucinor "to wander in mind") is defined as: "The apparent, often strong subjective perception of an external object or event when no such stimulus or situation is present; may be visual, auditory, olfactory, gustatory, or tactile."
The equivalent semantic field in the Chinese lexicon comprises contemporary loanwords (n.b., translation equivalents are primarily from Wenlin v. 4.3, 2016).