A glossary will help codify your organization's jargon. Please make sure you have a clear, authoritative source before building a glossary.
Process documentation requires using jargon. Most process templates include a section for "definitions." Definitions should be included here, so the process can be considered a complete reference text. However, definitions should also be included in a central glossary, to ensure terms are used consistently throughout the organization. This glossary can also be a training guide for new staff.
When adding terms to a glossary, consider:
Also consider whether it might be appropriate to have some form of change management over the glossary, and how to publicize the glossary to your department.
Departments tend to use the same words to mean different things, even inside the same University. Even if the IT department starts using words like "customer" and "user" consistently, that doesn't mean that anyone else at the University will understand.
There needs to be an owner for the glossary, someone such as a technical writer. There need to be "watchers" who notify the glossary owner when they hear a new term.