I thought hallucination is when the model imagines something that isn't there at all. Not a classification issue where it misinterprets an object in the source

I thought hallucination is when the model imagines something that isn't there at all. Not a classification issue where it misinterprets an object in the source data. Sometimes it might be difficult to tell, but in the case of moon -> traffic light it seems clear. Maybe I'm wrong about the terminology.