Signs shall mean any device, freestanding or attached to a building or structure, or erected, painted, represented or reproduced upon or in any building or structure which displays, reproduces or includes any letter, word, name, number, modes, insignia, design, device or representation used for one (1) or more of the following purposes: to identify the premises or occupant or owner of the premises; to advertise any trade, business, profession, industry, service or other activity; to advertise any product or item; to advertise the sale or rental or use of all or any part of any premises including that upon which it is displayed; to direct vehicular or pedestrian traffic and shall include any announcement, declaration, demonstration, display, illustration, insignia or any representation used to promote the interests of any person. "Sign" shall not be construed to mean any non-illuminated sign in the interior of any structure which is not visible from the outside of the structure under normal circumstances, unless specifically designated as such in this chapter. Included in this definition are freestanding "A- frame signs" (also known as "sandwich signs") and "feather flags" (also known as "swooper flags" or "flutter flags") placed upon the sidewalk or yard of the building or business premises.