diff --git a/docs/reference/glossary.md b/docs/reference/glossary.md
index 486cd1eb27..0ed65c9666 100644
--- a/docs/reference/glossary.md
+++ b/docs/reference/glossary.md
@@ -4,6 +4,10 @@ title: "Glossary"
 description: "This section defines common terminology referenced within the documentation."
 ---
 
+### Automation cluster
+
+See [orchestration cluster](#orchestration-cluster).
+
 ### Bridge
 
 Synonym to "[Connector](#connector)".
@@ -163,6 +167,14 @@ A message contains information to be delivered to interested parties during exec
 
 - [Messages](/components/concepts/messages.md)
 
+### Orchestration cluster
+
+An orchestration cluster includes Zeebe, Operate, Tasklist, Optimize, and Connectors. Previously [automation cluster](#automation-cluster).
+
+### Orchestration core
+
+An orchestration core or orchestration cluster core includes Zeebe, Operate, Tasklist, Optimize, and Identity.
+
 ### Outbound Connector
 
 Outbound [Connectors](#connector) in Camunda 8 allow workflows to trigger with external systems or services, making it possible to integrate workflows with other parts of a business process or system architecture.