Defining a global glossary
Only administrators, and other users with the capability site:doanything allowed, can define a glossary to be global.
Any course may contain a global glossary (but particularly the front page).
The difference to a normal local glossary is that the entries are used to create automatic links throughout the whole site (and not just in the same course the glossary belongs to).
Discaimer: This project has been funded with support from the European Commission. The presentation reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.