An executable file refers to a program file. Executables in DOS and Windows usually have an .exe or a .com extension. In UNIX and Macintosh environments, executable files can have any name.
A program file created from one or more source code files translated into machine code and linked together. The MS-DOS, Windows, and Windows NT operating systems use the .EXE filename extension to indicate that the file is a runnable program.
An executable file is a program. On Windows PCs, it typically has a .exe suffix.