aristotle - 5:31 pm on Jul 15, 2010 (gmt 0)
I have a glossary page on one of my sites, which Google uses for some define: searches. The page is called "Glossary" and I used the same DL and DT tags that Tedster mentioned. But the page doesn't draw much traffic from Google, no more than 5 visits per day. Apparently the definition option in Google search isn't used much.