“Natural groundwater basin” means the geographic area underlain by an aquifer, including recharge and discharge areas.

“Nonconforming building” means a building structure, or portion thereof, which does not conform to the regulations of this title, for the district in which it is situated and which lawfully existed at the time of the adoption of this title.

“Nonconforming use” means a building or parcel occupied by a use that does not conform to the regulations as to use for the district in which it is situated.