A ceiling is the upper interior surface of a room, typically covering the space above. It serves both functional and aesthetic purposes, providing insulation and hiding structural elements like beams and wiring. Ceilings can be made from various materials, including drywall, plaster, and tiles, and can be painted or decorated to enhance a room's appearance. There are different types of ceilings, such as flat ceilings, vaulted ceilings, and tray ceilings. Each type offers a unique look and can influence the overall feel of a space. Additionally, ceilings can incorporate features like lighting fixtures and ceiling fans for added functionality.