Hal-lū'çi-nā'tion, n.
n. [Lat. hallucinatio; Fr. hallucination, Sp. alucinacion, It. allucinazione.]
Sense 1. The act of hallucinating; error; delusion; mistake. Addison.
Sense 2. An error or illusion of sensible perception, occasioned by some bodily or organic disorder or affection, as distinguished from a phantasm, which is owing to disorder of the mind or imagination.
Sense 3. [Med.] The perception of objects which have no reality, or of sensations which have no corresponding external cause, arising from disorder of the nervous system, as in delirium tremens.