Primary Navigation
also called main nav, header nav
The main menu, usually in the header, holding the most important destinations.
The top menu. Keep it short.
What It Is
Primary Navigation belongs to Website, specifically the Structure part of it. Stated plainly: the main menu, usually in the header, holding the most important destinations.
It is a label with a settled working definition, so the value is in using it the same way every time. Used with that meaning, it stays a working tool rather than a talking point.
How It's Used
In practice, Primary Navigation shows up in site builds, page structure and the technical decisions underneath them. In real work it sits close to Navigation, Header and Information Architecture. The practical test is whether everyone in the room means the same thing by it.
Why It Matters
Primary Navigation is one of those items that only becomes visible when it is missing. When it is unclear, the site still launches — it just quietly underperforms. Deciding it deliberately costs one conversation. Leaving it undecided costs several.
It is the short word for a longer explanation. The top menu. Keep it short.
Termshift™
How the meaning shifts depending on who is using it, and where.
Inside the industry, Primary Navigation is used tightly and assumed to be understood: the main menu, usually in the header, holding the most important destinations.
Away from the jargon, it is the top menu. Keep it short.
The Bottom Line
The practical takeaway on Primary Navigation: the top menu. Keep it short. Judge it by that, not by how it sounds.