Positive symptom refers to more overt symptom, such as a Delusion or hallucination, displayed by some people with schizophrenia; other Postive symptoms include disturbed speech, and
disturbed behavior, that are exaggerations or distortions of normal thoughts, emotions, and behavior.
Positive symptom is likewise defined as presence of a behavior not seen in normal people.
Other /More definition:
positive symptom refers to more overt symptom, such as a delusion or hallucination, displayed by some people with Schizophrenia.