Which term describes a decorative cover or design applied to an object?

The term that accurately describes a decorative cover or design applied to an object is decoupage. This decorative technique involves gluing paper or fabric cut-outs onto a surface and often enhancing it with varnish or another finishing material. Decoupage can be applied to a variety of objects, transforming everyday items into decorative pieces through layering and artistic expression.

Embossing refers specifically to creating a raised design or pattern on a surface, typically using heat and pressure, rather than covering it. Engraving involves cutting or carving designs into a surface, often metal or glass, to create an image or text that is part of the object's surface rather than an applied decoration. Glazing generally refers to a glassy coating or finish, primarily used in ceramics and pottery, which adds a sheen and protects the surface but does not constitute a decorative design in the same way as decoupage.