Casting is a manufacturing process where a liquid material, typically metal, plastic, or other substances, is poured into a mold containing a hollow cavity of the desired shape. Once the material solidifies, the mold is removed, revealing the finished object. This process is widely used in industries like automotive, construction, and art to create complex shapes, intricate designs, and durable components. Casting methods include sand casting, die casting, investment casting, and continuous casting, each suited for specific applications and materials.