Home : File Types : DEF File (4 File Associations)

.DEF File Extension

File Type 1Module-Definition File

DeveloperN/A
Popularity
4.2 (15 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryDeveloper Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

What is a DEF file?

Lists the exports and attributes of a program to be linked by an application linker; used in software development when creating a DLL.

More Information

DEF files are used by Microsoft Visual C++, a component of Microsoft Visual Studio, as well as other C++ development software.

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Programs that open DEF files
Windows
Microsoft Visual Studio 2015
Updated 2006

File Type 2IOBit Malware Fighter Definitions File

DeveloperIObit
Popularity
3.4 (5 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryData Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.DEF File Association 2

File used by IObit Malware Fighter, a program used for removing malware and spyware from the PC; saves virus definitions used for identifying and removing malware from the computer.

More Information

DEF files use the filenames core000.def, core001.def, core002.def, etc. They are stored in the \db\ directory of the IObit Malware Fighter installation.

Programs that open DEF files
Windows
IObit Malware Fighter
Updated 10/1/2012

File Type 3M.U.G.E.N. Character Definition File

DeveloperElecbyte
Popularity
3.4 (8 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryGame Files
FormatText

Text

This file is saved in a plain text format. You can open and view the contents of this file using a text editor.

.DEF File Association 3

Game data file used by M.U.G.E.N., a sprite-based game engine used for making 2D fighting games; contains the definition for a character, including the character name and version information and the character specification files (.CNS, .SFF, .CMD, and .AIR) used by the engine.

Programs that open DEF files
Windows
Elecbyte M.U.G.E.N.
Updated 12/6/2011

File Type 4SmartWare II Data File

DeveloperSmartWare
Popularity
3.3 (4 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySpreadsheet Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.DEF File Association 4

Spreadsheet and database format used by SmartWare II database software.

Programs that open DEF files
Windows
SmartWare
Updated 2006

.DEF Extension Information

This page contains information about the file extension DEF and its known file associations. Our goal is to help you understand what a *.def file is and how to open it.

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