means any communication device, structure or fixture, illuminated or nonilluminated, which is visible from any public place, and containing advertising, or where the intent or effect is to direct attention to and to promote the sale of products, goods, services, events, or to identify a building. Murals, or painted wall designs or patterns which do not identify the user or a commercial product or service shall not be considered signs. (See Chapter
18.50 SMC for specific sign definitions.)