As used in this chapter, the following words shall have the meanings indicated:
Any waste or discarded material, old lumber or materials obtained from dismantled buildings, old iron or other metal or substance, glass, paper, machine parts, accessories, discarded machinery or discarded machines, in whole or in part, unregistered motor vehicles which are unfit for reconditioning for sale for highway transportation, used parts of motor vehicles and any material acquired or collected commercially and commonly known as "junk" in the ordinary meaning of the word.
A junk shop or junkyard keeper who also uses or intends to use one or more vehicles for the purpose of buying, collecting or otherwise acquiring junk for commercial purposes and placing, collecting or storing the same in his junkyard or junk shop.
Any building within the borough in which junk is placed, collected, stored or kept.
Any lot or land within the borough on which junk is placed, collected, stored or kept.