SIGN — Shall mean a name, identification, description, display or illustration which is affixed to, or printed to, or represented directly or indirectly upon a building, structure or parcel of land, and which directs attention to a person, institution, organization, activity, place, object or product of business, provided that the display of public notices, the flag, emblem or insignia of the United States of America, political unit, temporary signs or temporary display in connection with a charity drive for contributions shall not be considered signs under the provisions of this section.