The term COVERING LAYER can be defined as a COATING, which is a seven letter word. A COATING is a layer of material that covers the surface of an object, such as a paint or varnish. It is often used to protect the object from damage, corrosion, or wear and tear. Coatings can also be used to enhance the appearance of an object, such as adding a glossy finish or a color. Coatings are used in many industries, including automotive, aerospace, and construction.