Improve description of the .Site.RegularPages method

content/en/methods/site/RegularPages.md

@@ -12,6 +12,10 @@ action:
   signatures: [SITE.RegularPages]
 ---
 
+The `RegularPages` method on a `Site` object returns a collection of all [regular pages].
+
+[regular pages]: /getting-started/glossary/#regular-page
+
 ```go-html-template
 {{ range .Site.RegularPages }}
   <h2><a href="{{ .RelPermalink }}">{{ .LinkTitle }}</a></h2>