What is meaning of hollowing?

Hollowing refers to the process of creating a concave shape or removing material from the inside of an object. This can be done for a variety of reasons, such as reducing the weight of the object, creating a distinct visual effect, or improving functionality. In woodworking, hollowing is commonly used to create bowls, vases, and other decorative objects. In dental procedures, hollowing may refer to the removal of decayed or damaged material from a tooth in order to prepare it for a filling or crown. Overall, hollowing involves removing material from the interior of an object, resulting in a unique and often desirable shape or structure.