Hole

A hole is an empty space or cavity within a solid object or surface, where material is missing. It can be naturally occurring, like a cave in a mountain, or created intentionally, such as a drilled hole in wood or metal. Holes vary in size and shape, and their purpose often relates to function—like allowing for passage, fixing components, or reducing weight. They are essential in construction, manufacturing, and everyday objects for assembling, fitting parts together, or facilitating movement.