01 n. The act of hallucinating; a wandering of the mind; error; mistake; a blunder.
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1.
The act of hallucinating; a wandering of the mind; error; mistake; a blunder.“This must have been the hallucination of the transcriber.” — Addison.
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2.
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.(Med.)“Hallucinations are always evidence of cerebral derangement and are common phenomena of insanity.” — W. A. Hammond.