“Nonconforming building or structure” means any building, structure, or portion thereof, which was lawfully erected or altered but which, because of the application of this title, no longer conforms to the regulations of the zone in which it is located as defined in this title. (Ord. 3136 § 1, 2015; Ord. 2310 § 28, 2000; Ord. 2020 § 2, 1994; Ord. 1781 § 1, 1990; Ord. 190 Art. IV § 414, 1964. Formerly 21.02.518)