Engraving: The cutting or etching of designs or letters on metal, wood, glass or other materials. There are three engraving techniques. hand-engraving, hand-tracing, and computerized laser engraving. Engraving is performed with a diamond point or rotary blade that cuts into the surface of the product. Engraving offers a permanent imprint that will not wear off because it is cut into the metal base. Used in metals such as trophies, pens and nameplates.