The present invention provides a system and method for providing dynamic definition of an application object. In architecture, the system includes an application dictionary that contains information about the application object, and a class dictionary entry in the application dictionary that defines meta information about the application object. A modifier modifies the application dictionary to modify a definition of the application object. The present invention can also be viewed as a method for providing dynamic definition of an application object. The method operates by providing an application dictionary that contains information about the application object, and a class dictionary entry that defines meta information about the application object. The application dictionary is modified to modify a definition of the application object.