"Junk Yard" means any place where two or more motor vehicles not in running condition, or parts thereof, are stored in the open, in a fenced area or in a partially enclosed building, and are not being restored to operation, or any land used for wrecking or storing of such motor vehicles or farm machinery, or parts thereof, stored in the open and not being restored to operating condition, and including an open area where waste, scrap metal, used building materials, paper, rags or similar materials are bought, sold, exchanged, stored, baled, packed, disassembled or handled, but excluding such uses taking place entirely within a completely enclosed building.