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- A relationship between two objects in which one object is considered to be a more specific version of the other, generic object: "A camel is a mammal." Since the generic object really only exists in a Platonic sense, we usually add a little abstraction to the notion of objects and think of the relationship as being between a generic "base class" and a specific "derived class". Oddly enough, Platonic classes don't always have Platonic relationships--see "inheritance".
Perl - Cite This Source - This Definition - base class, derived class, empty subclass test, Inheritance, multiple inheritance, overriding, parent class, single inheritance, subclass, superclass, Tie