HALLUCINATORY • E-FREE TRANSLATION.COM • Definition of Hallucinatory

... subjective sensation is closely related to hallucination. In so far as the error involves the ascription of the sensation to a force external to the sense-organ, this part of the mental process must, when there is no such force present, be viewed as hallucinatory. Thus, the feeling of something creeping over the skin is an hallucination in the sense that it implies the idea of an object external to the skin. Similarly, the projection of an ocular impression due to retinal disturbance into the external field ...

— Illusions - A Psychological Study • James Sully

... as to the objective value of those symbolic forms that are the working material of the mystic imagination. This contest does not concern us here; but we may make the positive statement that the constructive imagination has never obtained such a frequently hallucinatory form as in the mystics. Visions, touch-illusions, external voices, inner and "wordless" voices, which we now regard as psycho-motor hallucinations—all that we meet every moment in their works, until they become commonplace. But as to the nature of these psychic states there are only two solutions ...

— Essay on the Creative Imagination • Th. Ribot