File Type : OPTLINK Digital Mars Module Definition File (Digital Mars)
Compatible with (Win10, Win8, Win7, Vista and WinXP)
You'll need a new app to open this .DEF file
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Lists the exports and attributes of a program to be linked by an application linker; used in software development when creating a DLL.
DEF files are used by Microsoft Visual C++, a component of Microsoft Visual Studio, as well as other C++ development software.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.
Software that can be used to open DEFfiles: