diff --git a/docs/en/glossary/glossary.asciidoc b/docs/en/glossary/glossary.asciidoc
index 36e47e3ef..d065d317a 100644
--- a/docs/en/glossary/glossary.asciidoc
+++ b/docs/en/glossary/glossary.asciidoc
@@ -380,6 +380,13 @@ An index is a logical namespace which maps to one or more
 <<glossary-replica-shard,replica shards>>.
 +
 //Source: Elasticsearch
+endif::elasticsearch-terms[]
+ifdef::elasticsearch-terms[]
+
+[[glossary-index-alias]] index alias ::
+
+include::{es-repo-dir}/glossary.asciidoc[tag=index-alias-def]
+
 endif::elasticsearch-terms[]
 ifdef::logstash-terms[]
 
diff --git a/docs/en/glossary/index.asciidoc b/docs/en/glossary/index.asciidoc
index 179b7027a..3fb909971 100644
--- a/docs/en/glossary/index.asciidoc
+++ b/docs/en/glossary/index.asciidoc
@@ -9,5 +9,7 @@
 include::{asciidoc-dir}/../../shared/versions.asciidoc[]
 include::{asciidoc-dir}/../../shared/attributes.asciidoc[]
 
+:es-repo-dir:          {docdir}/../../../../elasticsearch/docs/reference
+
 include::intro.asciidoc[]
 include::glossary.asciidoc[]