Hal*lu`ci*na"tion (-nā"shŭn),
n. [L. hallucinatio: cf. F.
hallucination.] 1. The act of
hallucinating; a wandering of the mind; error; mistake; a
blunder.
This must have been the hallucination of the
transcriber.
Addison.
2. (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; delusion.
Hallucinations are always evidence of cerebral
derangement and are common phenomena of insanity.
W.
A. Hammond.