Not that Wordnik doesn't give you multiple dictionary definitions, etymologies, and even pronunciation sound files for your look-ups. Its value service, however, is the extra context provided by highlighted Twitter posts, Flickr photos, related tags, and other multimedia on the results page. It's all spread out on a single multi-column page, but you can hit the sub-menus near the top to get a full page of any of them. Statistic geeks can also see how often words are being used online and the number of look-ups on Wordnik for a word. The site could be helpful for when you've got to get up to speed on something quickly and get a bit deeper than just a brief explainer.
Wordnik is free to use; signing up and logging in lets you track select words and history.