my answer was sir you itself as a person play different roles in life so even we as a person are polymorphic you are a trainer ,student,manager ,etc in different scenerios then a defination ....to polymorphism again types of polymorphism i added from my side and explained it in detail...like compile time and run time polymorphism and again compile time includes function overloading and operator overloading and run time includes virtual function and overiding..