Explicit and uniform criteria are prerequisite for diagnosis and research of the vestibular disorders. Based on this consensus, in 2006, Barany Society initiated a committee for classification to pursue development of the first International Classification of Vestibular Disorders. To facilitate this process, the committee first defined the key vestibular symptoms as a basis for a subsequent classification of specific vestibular disorders. This is to review the committee’s definition on the vestibular symptoms, which was published in 2009.