A GROOVE is a long, narrow channel in a surface. It is typically created by cutting or carving into the material, and can be used to guide the movement of objects along its length. Grooves are commonly found in many everyday items, such as the grooves on the edge of a coin, the grooves on the inside of a screwdriver, and the grooves on the outside of a record. They can also be used to create decorative patterns on surfaces.