What is the difference between method overloading and method overriding?

Method overloading (compile-time polymorphism) has multiple methods with the same name but different parameters in the same class. The compiler determines which method to call based on arguments. Method overriding (runtime polymorphism) has a subclass providing a specific implementation of a method already defined in its parent class. The JVM determines which method to call based on the actual object type at runtime. Overloading is about different signatures; overriding is about different implementations.