Module

(1) A Windows module is a file in the "Portable Executable format". Executable files (e.g. ProgramName.exe) and dynamic link libraries (e.g. LibraryName.dll) are modules. Modules can contain program code and data (resources.) At runtime a module is accessed through its handle. This handle is the base address in memory to which the module image from the file was mapped when it was loaded.

(2) A program source file containing different functions and classes can be referred to as a module.