To create a collaborative glossary:
Go to the community course and Turn editing on.
In the section where you want to add the glossary, select Glossary from the Add an Activity menu.
On the adding a new Glossary screen, give the glossary a name. You can be a bit more generic with the name in this instance and simply call it Glossary.
In the description field, describe the purpose of the glossary and give special instructions, if any.
The entries shown per page can be left at the default 10, or changed as desired.
Only select Is this glossary global? if you want the glossary to be available throughout the site. Most glossaries are only used in a given course.
Leave the glossary type on Secondary glossary, unless you plan on combining glossaries later. Secondary glossaries can be imported into a primary glossary, but there can only be one primary glossary per site.
For a community glossary, it might be useful to set the Duplicate entries allowed to Yes, in order...