The glossary is a default page in every knowledge base. Its permalink is always "glossary", so you can get to the glossary by going to "/help/glossary" in your knowledge base (or "/home/glossary" or "/docs/glossary" if you are using a different root path).
For example, here is the glossary page for our help and documentation (we haven't set ours up yet so you'll just see some test terms):
If you are ready to share your glossary with your readers, you can add it to the table of contents under Settings > Basic > Website Settings > Table of Contents > "Add a glossary link to the top of the table of contents". You can also manually link to it from your top navigation, home page, or articles using the link "/help/glossary".