A "high wall" refers to a vertical structure that is significantly taller than average walls, often used for security, privacy, or aesthetic purposes. These walls can be made from various materials, including brick, concrete, or wood, and are commonly found in residential, commercial, or industrial settings. High walls can serve multiple functions, such as enclosing a property, blocking noise, or providing protection from the elements. In some cases, they may also be part of fortifications or landscaping designs, enhancing the overall appearance of a space while ensuring safety and seclusion.