As used in this chapter, the following terms shall have the meanings indicated:
Any privately owned receptacle, container or other structure, either permanent or portable and located either in or above the ground, which is or was artificially or semi-artificially constructed for the containment of water so as to provide recreational facilities for private swimming, bathing or wading by adults and/or children, which is capable of holding water to a depth exceeding 18 inches and which is located upon a parcel of privately owned real property.