Definitions
1.nounAn object class derived from another class (its superclass) from which it inherits a base set of properties and methods.
2.nounA rank directly below class
3.nounA secondary class within a main class.
4.verb(in object-oriented programming) To create a subclass of (some class)."I subclassed the Button class to create a more specialised FancyButton class for my user interface."
5.verbTo cause (an object) to act as an instance of a subclass (by creating the desired subclass and instantiating an object of this subclass).