Update definition for "status message"

guidelines/terms/21/status-message.html

@@ -1,6 +1,4 @@
 <dt><dfn id="dfn-status-messages" data-lt="status messages">status message</dfn></dt>
 <dd>
-
-   <p>change in content that is not a <a>change of context</a>, and that provides information to the user on the success or results of an action, on the waiting state of an application, on the progress of a <a>process</a>, or on the existence of errors</p>
-
+   <p>discrete piece of content that is changed/updated dynamically to provide information to the user on the success or results of an action, on the waiting state of an application, on the progress of a <a>process</a>, or on the existence of errors</p>
 </dd>