For the purpose of these regulations, certain terms are hereby defined. Words used in the present tense shall include the future; the singular number shall include the plural and the plural the singular; the word "building" shall include the word "structure" and "premises"; the word "shall" is mandatory and not directory; the words "used" or "occupied" include the words "intended," "designed," or "arranged to be used or occupied"; the word "lot" includes the words "plot," "parcel," or "tract"; and the word "person" includes a firm, association, organization, partnership, trust, company, or corporation as well as an individual. Any word not herein defined shall be as defined in any recognized standard English dictionary.