.DEF file extension

How to open file with .DEF extension?

Klaus Mehler, 28.08.2014
Info

.DEF is the file extension developed by for the needs of their proprietary software. The files with the .DEF extension belong to the "Various Files" category. The full name of this type of files is Definition. Files with the .DEF extension can be opened in several ways. The easiest is to install the manufacturer’s application. Fortunately, this is not the only method. There are many applications on the market that successfully open files with the .DEF extension. Below is a list of such applications. Among them are also applications fully free of charge for home use.

Definition

Ads OS Software
WINDOWS
Microsoft Visual Studio Microsoft Visual Studio
Visual C++ Visual C++
ArcGIS for Desktop Basic (ArcView) ArcGIS for Desktop Basic (ArcView)
AutoCAD AutoCAD
SmartWare SmartWare
SmartWare II SmartWare II
AniSprite AniSprite
Modula-2 for Java Modula-2 for Java
OPTLINK OPTLINK
Linux DataFlex DataFlex

Data Entry/Review Module

OS Software
WINDOWS
Data Entry & Review Module Data Entry & Review Module

Nova Logic Game Weapon Profile

OS Software
WINDOWS
Delta Force Delta Force

ESwin Wizard

OS Software
WINDOWS
ESwin ESwin

After downloading and installing the software in our system, files with the .DEF extension should be automatically associated with the new application. With this association, the file can be opened by double-clicking the mouse. If for some reason we still cannot open the file with the .DEF extension, we still have one method. It involves the attempt to open the file from the installed application. Choosing from the menu "FILE", we perform the command "Open" and the explorer window we select the file we are interested in, and then we confirm by pressing enter. This method is more time-consuming, but enables us to definitively state whether we use the correct application to open the files with the .DEF extension. If we are sure of it, we then use the extended reference menu (shift key and right mouse button) and by selecting "Open With", we select the appropriate application and we permanently connect it with a file with the extension we are interested in.