Meaning of CALLBACK in English
A process for invoking a method or a desktop command , or for using the gadget library in an application; the means by which dialogs and gadgets respond to user input. For example, when an administrator makes a selection with the mouse, some action is initiated from the user interface to an underlying object representing some system resource or component; that is, the user interface "calls back" to the object to invoke some method or series of methods.
Josh's Network English Glossary. Английский словарь Josh's Network. 2012