What is polymorphism, what is it for, and how is it used?
I believe it is incorrect to imply that polymorphism is specific to classes and/or object-oriented programming, seeing how ad hoc polymorphism or parametric polymorphism do not necessarily require classes and/or objects. I think what this answer is talking about is subtyping (also known as subtype polymorphism or inclusion polymorphism).

oop - What is the difference between dynamic and static polymorphism in ...
Can anyone provide a simple example that explains the difference between Dynamic and Static polymorphism in Java?

Polymorphism vs Overriding vs Overloading - Stack Overflow
Polymorphism is the ability of a class instance to behave as if it were an instance of another class in its inheritance tree, most often one of its ancestor classes. For example, in Java all classes inherit from Object. Therefore, you can create a variable of type Object and assign to it an instance of any class. An override is a type of function which occurs in a class which inherits from ...

oop - What is polymorphism in JavaScript? - Stack Overflow
Polymorphism is one of the tenets of Object Oriented Programming (OOP). It is the practice of designing objects to share behaviors and to be able to override shared behaviors with specific ones. Polymorphism takes advantage of inheritance in order to make this happen. In OOP everything is considered to be modeled as an object. This abstraction can be taken all the way down to nuts and bolts ...

What is the main difference between Inheritance and Polymorphism?
18 The main difference is polymorphism is a specific result of inheritance. Polymorphism is where the method to be invoked is determined at runtime based on the type of the object. This is a situation that results when you have one class inheriting from another and overriding a particular method.

oop - Polymorphism (in C) - Stack Overflow
Possible Duplicate: How can I simulate OO-style polymorphism in C? I'm trying to better understand the idea of polymorphism with examples from languages I know; is there polymorphism in C?

java - Why to use Polymorphism? - Stack Overflow
Polymorphism (both runtime and compile time) is necessary in Java for quite a few reasons. Method overriding is a run time polymorphism and overloading is compile time polymorphism.

Polymorphism - Define In Just Two Sentences - Stack Overflow
I've looked at other definitions and explanations and none of them satisfy me. I want to see if anybody can define polymorphism in at most two sentences without using any code or examples. I don't ...

Why do we need virtual functions in C++? - Stack Overflow
23 I've my answer in form of a conversation to be a better read: Why do we need virtual functions? Because of Polymorphism. What is Polymorphism? The fact that a base pointer can also point to derived type objects. How does this definition of Polymorphism lead into the need for virtual functions? Well, through early binding. What is early binding?

Polymorphism in C++ - Stack Overflow
Actually, C++ has four kinds of polymorphism: parametric (genericity via templates in C++), inclusion (subtyping via virtual methods in C++), overloading and coercion (implicit conversions). Conceptionally, there is little distinction between function overloading and operator overloading.