diff --git a/docs/mkdocs.yml b/docs/mkdocs.yml
index fccd5e826..2ddc412ab 100644
--- a/docs/mkdocs.yml
+++ b/docs/mkdocs.yml
@@ -159,6 +159,7 @@ nav:
       - Nix API:
           - buildClan: reference/nix-api/buildclan.md
           - Inventory: reference/nix-api/inventory.md
+      - Glossary: reference/glossary.md
       - Decisions:
           - Architecture Decisions: decisions/README.md
           - 01-clanModules: decisions/01-ClanModules.md
diff --git a/docs/site/reference/glossary.md b/docs/site/reference/glossary.md
new file mode 100644
index 000000000..b9f73b225
--- /dev/null
+++ b/docs/site/reference/glossary.md
@@ -0,0 +1,38 @@
+# :material-api: Glossary
+
+## clan
+Collection of machines interconnected in a network.
+
+## clan-app
+Graphical interface for managing clans. Simpler to use than the `clan-cli`.
+
+## clan-cli
+Command-line tool for managing clans.
+
+## clanModule
+Module that enables configuration via the inventory.
+Legacy `clanModules` also support configuration outside the inventory.
+
+## clanService
+Service defined and managed through a clan configuration.
+
+## clanURL
+Flake URL-like syntax used to link to clans.
+Required to connect the `url-open` application to the `clan-app`.
+
+## facts *(deprecated)*
+System for creating secrets and public files in a declarative way.  
+**Note:** Deprecated, use `vars` instead.
+
+## inventory
+JSON-like structure used to configure multiple machines.
+
+## machine
+A physical computer or virtual machine.
+
+## role
+Specific function assigned to a machine within a service.
+Allows assignment of sane default configurations in multi-machine services.
+
+## vars
+System for creating secrets and public files in a declarative way.