Glossary
Rest assured that your readers fully understand your content. With hover-over definitions in articles, you can be sure everyone is on the same page.
or

Don't lose your place when you need a definition
hover-over definitions
Help onboard faster with lingo defined directly in the article
No context-switching or uncertainty: you can give hover-over definitions directly within your article. Train new staff faster on terminology and let them stay on the same page.
Add glossary terms to search results
Your knowledge base can also be a glossary for all contexts
If a reader hears a term they're unfamiliar with in any context, they can search for it in your knowledge base and find the definition - adding to your single source of truth.
Glossary page
Glossary pages are a classic for a reason
You can also have your Glossary page within your Table of Contents - allowing your readers to brush up on terminology at large if they wish!