A conical frustum is a three-dimensional geometric shape that results from slicing the top off a cone. It has two circular bases: one larger and one smaller, connected by a curved surface. The height of the frustum is the perpendicular distance between the two bases. This shape is commonly found in everyday objects, such as cups, lampshades, and certain types of vases. The volume and surface area of a conical frustum can be calculated using specific mathematical formulas, making it an important concept in geometry and engineering.