Words used in the present tense include the future tense; the singular includes the plural and the plural the singular; and the masculine gender includes the feminine and neuter. The words "applicant", "person", "subdivider", "developer" and "owner" include a corporation, unincorporated association and a partnership, or other legal entity, as well as an individual. The word "street" includes thoroughfare, avenue, boulevard, court, expressway, highway, arterial and road. The word "building" includes structures and shall be construed as if followed by the phrase "or part thereof". The word "lot" includes "plot", "parcel" and "tract". The words "occupied" or "used", as applied to any building or premises, shall be construed as if followed by the phrase "or intended, arranged or designed to be occupied or used". The word "watercourse" includes channel, creek, ditch, drain, dry run, river, spring and stream, whether permanent or intermittent, whether natural or man-made. The word "approve" shall be construed as if followed by the phrase "or disapprove". The words "should" and "may" are permissive; the words "must", "shall" and "will" are mandatory and directive. Any reference to "this Zoning Code" includes all ordinances amending or supplementing the same. All distances and areas refer to measurements in a horizontal plane. Where terms or words are not defined, they shall have their ordinarily accepted meanings or such that the context may imply.