diff --git a/terms.html b/terms.html
index 319e0b94..e4da3c61 100644
--- a/terms.html
+++ b/terms.html
@@ -70,8 +70,10 @@
   <dt><dfn data-lt="did controllers|did controller(s)">DID controller</dfn></dt>
 
   <dd>
-The entity, or a group of entities, in control of a <a>DID</a> or
-<a>DID document</a>. Note that the <a>DID controller</a> might include the
+The entity that has the ability to make changes to a <a>DID document</a>. 
+A <a>DID</a> can have more than one controller. The <a>DID controller(s)</a>
+are denoted by the `controller` property on the top level of the <a>DID
+document</a>. Note that the <a>DID controller(s)</a> might include the
 <a>DID subject</a>.
   </dd>