psychopathology: hallucination
This psychotic symptom found in a variety of serious mental disorders involves sensory perceptual distortions, for example seeing (visual), hearing (auditory), smelling (olfactory), feeling (haptic, tactile), or tasting (gustatory) sensations that others would not sense and do not exist outside one's perception.Also: command hallucination, delusion, paranoia, hallucinate, vision
The online Diagnostic & Statistical Manual of Mental Disorders lists most of the major psychological disorders and illnesses and lists the criteria that must be fulfilled in order for a diagnosis to be made. This resource is not a substitute for proper professional psychiatric diagnosis.