“Junkyard” means any lot or portion of any lot used for the storage or keeping of junk or waste material including worn-out or wrecked motor vehicles, scrap, partially or fully discarded tangible materials, combinations of materials or items such as machinery, metal, rags, rubber, paper, plastics, chemicals, and building materials that cannot, without further alteration or reconditioning, be used for their original purpose. A junkyard may include an auto wrecking yard. (Ord. 573 § 2, 1990).