GEO / Content · 06 min read · Updated Sep 2026
Definition content for AI: glossaries that say what a term is not
A definition is the most quoted kind of sentence on the web. It is also the easiest to get wrong if it never states the boundary.
Write definitions as a first sentence plus a boundary, then link to the page that shows what to do.
Define in the first sentence
‘A soft 404 is a missing page that still returns a success status.’ Lead with that shape. History, opinions, and related tools come after.
Use the term the reader searched, then the more precise term if they differ. Do not make the reader wait for the acronym to be unpacked.
Add the exclusion
Say what the term is not. A canonical tag is not a redirect. GEO is not a meta tag. Those exclusions stop a summary from sliding into the neighbouring concept.
One definition per URL or per heading. A glossary page can hold many terms if each term has its own heading and a unique sentence.
- First sentence is the definition.
- One explicit exclusion.
- No paragraph that only repeats the term.
Link the definition to the working guide
A glossary entry should point to the guide that shows the fix. The definition gets cited; the guide earns the visit.
When the industry redefines a term, update the sentence. Old definitions are how teams keep optimising for retired products.
Questions
Are glossary pages good for GEO?
Yes when each term is defined clearly and linked to a deeper guide. A list of terms with no definitions is not.
Should definitions be their own pages?
When the term has its own query and enough to say. Otherwise a headed section on the parent guide is the better home.
Continue reading
- Source attribution: show where a claim came from
- Semantic HTML for AI crawlers: a document, not a pile of divs
- Backlinks as source trails: earn the mention before asking for it
This note is part of the Hong Kong field library from My Search / Visibility, built with Itehk.