graywolf has made some good observations about definitions appearing above the organic search results in Google. For example, if I search Google for, “what is plantar fasciitis” it returns:
Where the first entry is a Google dictionary item. When you click on it, 5 links to different definitions are displayed. The link in the first position is what gets displayed on the main search results page.
One thing I noticed, and it could be a cooincidence, is that all the pages listed had “Glossary” in the title tag, high up on the page and in the url.
Barry follows up and shares some background along with his thoughts on how to optimize content for Google Dictionary.
You can find more definitions using the define: command.