The purpose of this chapter is to provide definitions of the terms and phrases used in this title that are technical or specialized in an effort to ensure consistency in the interpretation of the zoning code. For the purpose of this title, certain terms and words in the plural number include the singular and the singular includes the plural; the word “building” includes the word “structure,” and the word “shall” is mandatory and not directory. (Ord. 582 § 1 (Exh. A (part)), 2009)