Whenever used in this chapter, unless a different meaning appears from the context, the following terms shall have the meanings indicated:
Includes person, partnership, firm, company, corporation, tenant, owner, lessee or licensee, their agents, heirs or assigns.
Any vehicle or structure designed and constructed in such manner as will permit occupancy thereof as sleeping quarters for one or more persons or the conduct of any business, 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 streets, propelled or drawn by its own or other motive power, excepting a device used exclusively upon stationary rails or tracks.