I'm with Cindy on this.
I already have a Glossary ... how do I make it the Global Glossary?
PS. My copy of Moodle (which I don't manage) is on 2.6.7. From the documentation, this seems to rule out exporting and then importing (as not everything is moved across).
Also, I'm not clear how to get the Global Glossary to appear with the courses.
I've a couple of books on managing Moodle, and I've looked through the online docs, but neither of these questions have been answered.
This has come about after creating a new version of our main course ... and it doesn't seem to have a fully working glossary.