Compile time polymorphism(Static polymorphism) means

basically those language structure which will cause the

compiler to produce code at the compile-time. That is, the

compiler is well aware that what code is to be generated at

the compile-time itself: Ex: overloading of operators,

functions.

Run time Polymorphism(Dynamic Polymorphism)means that the

compiler is unaware what code is to be generated so it binds

the possible code and let the program decide it at the

run-time itself.Ex: the virtualness of a class member or the

entire class itself.