As used in this chapter, the following terms shall have the meanings indicated:
NONCONFORMING BUILDING OR STRUCTURE
Any structure which is devoted to a use which is permitted in the zoning district in which it is located, but which is located on a lot that does not conform to applicable lot size and/or area and bulk requirements, where such building or structure existed lawfully prior to the enactment of this chapter or amendment.
NONCONFORMING LOT OF RECORD
An undeveloped lot which does not comply with the applicable provisions contained in this chapter, or any amendment hereafter enacted, but which was lawfully in existence prior to the enactment of this chapter.
NONCONFORMING USE
A use of part or all of a structure, or a use of land (not involving a structure or only involving a structure which is accessory to such use of land), which does not comply with the applicable use regulations contained in this chapter, where such use existed lawfully prior to the enactment of this chapter or amendment.