WordWeight : Weighing the Words

Pronunciation : Hal*lu`ci*na"tion
Part of Speech : n.
Etymology : [L. hallucinatio cf. F. hallucination.]
Definition : 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.)

Defn: The perception of objects which have no reality, or of sensations which have no corresponding external cause, arising from disorder or the nervous system, as in delirium tremens; delusion. Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity. W. A. Hammond.
Source : Webster's Unabridged Dictionary, 1913