What is the meaning of the furniture term Countersink?

Countersink refers to a feature or technique applied to a hole or indentation on a surface of furniture or any object to allow the screw head to be flush or slightly below the surface. A countersunk hole is typically cone-shaped, wider at the surface and narrower towards the bottom, so that when a screw is inserted, it sits flush or recessed into the material, creating a smooth and even surface. Countersinking is commonly used in woodworking and carpentry to provide a neat and finished appearance to furniture or other wooden items.