diff --git a/docs/GLOSSARY.md b/docs/GLOSSARY.md
new file mode 100644
index 0000000..2a66803
--- /dev/null
+++ b/docs/GLOSSARY.md
@@ -0,0 +1,8 @@
+# Glossary
+
+Running definitions for industry terms used in geolocal.io planning.  
+**Rule:** first use in a thread explains the term; after that the acronym is fine. Add new entries here when a term appears.
+
+| Term | Meaning |
+| :--- | :--- |
+| **NAP** | **N**ame, **A**ddress, **P**hone — the core business identity fields. Local search (and AI assistants that lean on local listings) need NAP to be consistent across Google, Apple Maps, Bing, Yelp, the website, and any owned record. Mismatches confuse ranking and recommendations. |
diff --git a/docs/README.md b/docs/README.md
index 91754d9..04619a8 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -11,3 +11,7 @@
 | [archive/](./archive/) | Historical only — not operating docs |
 
 Governance: if two docs disagree, resolve against strategy or deliberately change strategy.
+
+## Glossary
+
+- [GLOSSARY.md](./GLOSSARY.md) — running industry terms (NAP, etc.)