Cone/kəʊn/ Definition 1 of 5Pro Tip 1/2Common Shapes The term 'cone' also describes shapes resembling an ice cream cone in math and everyday objects. A party hat is often in the shape of a cone. Pro Tip 2/2Component Naming 'Cone' can be used to name parts shaped like cones, found in machines or designs. The robot's arms ended in cone-like grippers.