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>> DEF file

DEF file format description

Many people share .def files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .def file can be edited, converted or printed with. On this page, we try to provide assistance for handling .def files.

2 filename extension(s) found in our database.

.def - C++ Definition File

DEF file is a C++ Definition File. C++ is a general-purpose programming language. It is a statically-typed free-form multi-paradigm language supporting procedural programming, data abstraction, object-oriented programming, and generic programming.

.def file format description:
DEF format
Visual C++
Development files
- / -
C++ Definition File related links:
C++ Definition File related extensions:
Visual C# .NET Class
Visual C++ Dialog
C++ Header File
Visual C++ TLH Header
Visual C++ TLI Header

.def - Binary Editor Definition Data

DEF file is a Binary Editor Definition Data. The Binary Editor software allows for editing of the Ford EEC binary data. Its definition files (Strategy Files) are open source and are saved in Excel.

.def file format description:
DEF format description not yet available
Binary Editor
Configuration files
- / -
Binary Editor Definition Data related links:
Binary Editor Definition Data related extensions:
PC Desktop Cleaner Configuration
Rhino 3D Color Options
VICE Keyboard Map
ShopSite Store Authorization Data
TeamSpeak Keybinding
DragThing Color Settings

Naturally, other applications may also use the .def file extension. Even harmful programs can create .def files. Be especially cautious with .def files coming from an unknown source!

Can't open a .def file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .def file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

edf, cef, dsf, dff, df, det, wef, dee, sef, dec, fef, de, eef, d3f, dwf

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

CenturionMail Encrypted Email
Autodesk 3D Scene
WinAce Encrypted Archive
DEViANCE Group Abbreviation
Diploma Exam File
VersaPro Declaration File

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