hallucination
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hallucination
A sensory perception (e.g., seeing, hearing, feeling) for which there is no external, real stimulus. Hallucinations often occur in connection with mental illnesses, drug use, or neurological disorders.
Nach der Einnahme der Medikamente hatte der Patient akustische Halluzinationen und hörte Stimmen.
After taking the medication, the patient had auditory hallucinations and heard voices.
In a medical or psychological context, the plural form is often used. Typical verbs are 'Halluzinationen haben' (to have hallucinations), 'Halluzinationen bekommen' (to get hallucinations), or 'unter Halluzinationen leiden' (to suffer from hallucinations).
Der Patient leidet seit Tagen unter starken Halluzinationen.
The patient has been suffering from severe hallucinations for days.
You can often recognize the figurative meaning by the fact that the word is in the singular and is combined with adjectives like 'rein' (pure) or 'bloß' (mere). It then describes a completely unrealistic idea.
Sein Plan, die Welt allein zu retten, war eine bloße Halluzination.
His plan to save the world all by himself was a mere delusion.
To specify the type of perception, the word is often combined with adjectives. Common ones are 'akustische Halluzinationen' (auditory hallucinations/hearing), 'visuelle Halluzinationen' (visual hallucinations/seeing), and 'olfaktorische Halluzinationen' (olfactory hallucinations/smelling).
Bei visuellen Halluzinationen sehen die Betroffenen Dinge, die nicht da sind.
With visual hallucinations, those affected see things that are not there.
vision
'die Vision' and 'die Halluzination' can both refer to something that someone sees or experiences, even though it is not simply a normal external perception. 'die Vision' often sounds religious, mystical, or especially meaningful. 'die Halluzination' is more of a medical or psychological word and means a perception without a real external stimulus. Figuratively, it can also mean a completely false idea. Learners may confuse the words because both can seem like an 'image in the mind'. In the context of illness, drugs, or false perception, 'Halluzination' fits; for a mystical apparition, 'Vision' is more likely.
Nach dem Fieber hatte der Patient eine Halluzination und hörte Stimmen.
After the fever, the patient had a hallucination and heard voices.
In der alten Geschichte hat die Heilige eine Vision von einem Engel.
In the old story, the saint has a vision of an angel.