DFSG - meaning and definition. What is DFSG
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Online Dictionary

What (who) is DFSG - definition

REQUIREMENTS FOR SOFTWARE TO BE PART OF THE DEBIAN SYSTEM
DFSG; Desert Island test; Dissident test; Tentacles of evil test

DFSG         
Debian Free Software Guildlines (Reference: Linux, Dabian)
Debian Free Software Guidelines         
The Debian Free Software Guidelines (DFSG) is a set of guidelines that the Debian Project uses to determine whether a software license is a free software license, which in turn is used to determine whether a piece of software can be included in Debian. The DFSG is part of the Debian Social Contract.

Wikipedia

Debian Free Software Guidelines

The Debian Free Software Guidelines (DFSG) is a set of guidelines that the Debian Project uses to determine whether a software license is a free software license, which in turn is used to determine whether a piece of software can be included in Debian. The DFSG is part of the Debian Social Contract.