The definition of a louvered is a window, door, or other structure that has overlapping horizontal slats or blades that can be adjusted to control the amount of air or light that passes through. Louvers are often used in ventilation systems, such as in air conditioning units, to control the flow of air. They can also be used to provide privacy or to block out sunlight. Louvers can be made from a variety of materials, including wood, metal, and plastic, and can be either fixed or adjustable. Fixed louvers are permanently set in one position, while adjustable louvers can be adjusted to open and close. Louvers are an effective way to control the flow of air and light, and can be used in both residential and commercial applications.