For the purpose of this subchapter, the following definition shall apply unless the context clearly indicates or requires a different meaning.
LANDSCAPING. Include trees, shrubs, ground cover, vines, walkways, ponds, fountains, sculpture, or other organic and inorganic materials used for creating an attractive appearance.
SCREENING DEVICES. Any structure installed to conceal areas used for refuse mechanical equipment, parking (service and loading bays or lanes), multi-family habitation, and commercial or industrial activities from adjacent residential districts and from street views.
WALLS or FENCES. Any structure intended for the use of confinement, prevention of intrusion, boundary identification, or screening or an activity.
(Zoning Code, Art. III Part II)