a method that defines all aspects of itself except what code it executes
a method that is declared, but contains no implementation
a method that is declared but not defined
a method which has no implementation
a method whose implementation is deferred to a subclass
a method whose implementation is to be provided by a subclass
a method with no implementation , only a declaration of its signature
a method without any method body
a method without implementation, i
a special kind of virtual method
a special method that does not have an actual implementation in the abstract base class
a virtual method with no implementation
A method that has no implementation.
method definition that specifies the method interface but gives no method implementation (i.e. there is a header but no body).