As used in this chapter, the following words shall have the meanings indicated:
Unless a different meaning appears from the context, any vehicle or structure so designed and constructed in such manner as will permit occupancy thereof as sleeping quarters for one (1) or more persons, or the conduct of any business or profession, occupation or trade, or use as a selling or advertising device and so designed that it is or may be mounted on wheels and used as a conveyance on highways or city streets propelled or drawn by its own or other motive power, excepting a device used exclusively upon stationary rails or tracks.