Free On-line Dictionary of Computing:
A set of classes and their interrelationships.
One class may be a specialisation (a "
" or "
") of another which is one of its "superclasses" or
is invoked on an
it is first looked
for in the object's class, then the superclass of that class,
and so on up the hierarchy until it is found. Thus a class
need only define those methods which are specific to it, and
inherits methods from all its superclasses.