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?

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.

Polymorphism vs Overriding vs Overloading - Stack Overflow
65 Polymorphism means more than one form, same object performing different operations according to the requirement. Polymorphism can be achieved by using two ways, those are Method overriding Method overloading Method overloading means writing two or more methods in the same class by using same method name, but the passing parameters is different.

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.

Compile-time polymorphism and run-time polymorphism - Stack Overflow
For ad-hoc polymorphism there's also the question of whether the resolution of implementation code happens at run-time (dynamic) or compile-time (static). Method overloading is generally static, and method overriding is dynamic. This is where the terms static/compile-time polymorphism and dynamic/run-time polymorphism come from.

java - Why to use Polymorphism? - Stack Overflow
The good reason for why Polymorphism is need in java is because the concept is extensively used in implementing inheritance.It plays an important role in allowing objects having different internal structures to share the same external interface.

class - What exactly is Polymorphism? - Stack Overflow
I have tried to understand exactly what Polymorphism in OOP means. All of the tutorials I have read say pretty much the same thing: 'Polymorphism is the fact that if class A inherits/extends class...

polymorphism - What is polymorphic method in java? - Stack Overflow
In the context of Java, please explain what a "polymorphic method" is.