>> 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.

4 filename extension(s) found in our database.

.def - C++ Definition File

The DEF development files are related to Visual C++. 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.

Visual C++
Development files
- / -
C++ Definition File related extensions:
Visual C++ Dialog
RapidWeaver Style File
Adobe RoboHelp Screen Layout Page
Adobe RoboHelp Exported Screen Layout
Shockwave Flash Debug
EasyLanguage Document

.def - Binary Editor Definition Data

The DEF configuration files are related to Binary Editor. 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.

Binary Editor
Configuration files
- / -
Binary Editor Definition Data related extensions:
PC Desktop Cleaner Configuration
VICE Keyboard Map
Micro Focus Extra! Keyboard Map
Reflection FTP Settings
Daqarta Mixer Settings
Final Cut Pro Color Board Preset

.def - SmartWare Definition Data

The DEF data files are related to SmartWare. DEF file is a SmartWare Definition Data. SmartWare is a programming platform. SmartWare also includes a word processor, spreadsheet, and communication modules.

Data files
- / -
SmartWare Definition Data related extensions:
SmartWare Executable Program
SmartWare Backup Definition Data
SmartWare Backup Query Definition
SmartWare Backup Report Definition
SmartWare Sort Definition Backup
SmartWare Backup Transaction Definition

.def - Doom 3 Map Definition Data

The DEF game data files are related to Doom 3. DEF file is a Doom 3 Map Definition Data. Doom 3 is a science fiction survival horror first-person shooter video game developed by id Software.

Doom 3
Game Data files
- / -
Doom 3 Map Definition Data related extensions:
Super 3D Noah's Ark Data
Grand Theft Auto V Manifest Data
Purble Pairs Saved Game
WorldEdit Schematics Data
Doom 3 Audio/Video Log Data
Doom 3 Articulated Figures Data

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:

cef, d3f, ddf, de, deb, dec, ded, dee, der, det, dev, df, dff, drf, dsf

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

CenturionMail Encrypted Email
Paradox Table Filter
ProWorx NXT Data Setup File
QPEACE Cluster Exchange Format Data
Lightscape Parameter File
Diploma Exam File

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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