ELI5: Explain Like I'm 5

Polymorphic code

Polymorphic code is a type of code that can change form or shape. This means the same code can be used in a different way depending on what it is given. For example: You have a piece of code that draws a circle. This code can be given different sizes and colors of circles, and it will still draw them. So the same code can draw different circles that are different sizes and colors, it has "changed shape" or been "polymorphic".