(o) “Sign.” Any display, figure, painting, drawing, placard, poster, or other device, visible from a public way or adjoining property, which is designed, intended, or used to convey a message, advertise, inform, or direct attention to a person, institution, organization, activity, place, object, or product. It may be a structure or a part thereof or it may be painted on or attached directly or indirectly to a structure, material, or object. It may be painted on stone or be formed out of shrubbery.