diff --git a/schema/Entity.schema.yaml b/schema/Entity.schema.yaml
index 05c40b6efe..1309608d40 100644
--- a/schema/Entity.schema.yaml
+++ b/schema/Entity.schema.yaml
@@ -19,5 +19,14 @@ properties:
     # and so should not have a `@id` since it is not a property.
     description: The identifier for this item.
     type: string
+  meta:
+    # This property has been added to allow for tools that
+    # use this schema to add experimental, ad-hoc properties to
+    # entities.
+    # Ad-hoc properties that become commonly used may become part of
+    # the schema proper.
+    '@id': stencila:meta
+    description: Metadata associated with this item.
+    type: object
 required:
   - type
diff --git a/schema/Thing.schema.yaml b/schema/Thing.schema.yaml
index 6a31002e8e..e553ec5530 100644
--- a/schema/Thing.schema.yaml
+++ b/schema/Thing.schema.yaml
@@ -15,14 +15,6 @@ properties:
     '@id': schema:description
     description: A description of the item.
     type: string
-  meta:
-    # This property has been added to allow for applications that
-    # use this schema to add ad-hoc properties to things. Ad-hoc
-    # properties that become commonly used may become part of
-    # the schema proper.
-    '@id': stencila:meta
-    description: Metadata associated with this item.
-    type: object
   name:
     '@id': schema:name
     description: The name of the item.