Shahi is a visual dictionary combining Wiktionary content with Flickr images. It’s a simple but perfect example of what anyone can do with APIs: a mashup, which is IMHO a centripetal approach to what web should be (instead of centrifugal approaches adding more sometimes unnecessarily). This is not a social dictionary like the ones reviewed here: there’s no way to share, tag, rate or modify content.

Wiktionary + Flickr + Google Images+  Wordnet

The idea works best with concrete nouns rather than with abstract/conceptual terms. Obviously, a picture of a ditch is worth a 1000 words…but what about the state, for instance, of being dizzy? You can always try changing the image feed:

PS: Shahi means Tea in Arabic but when you google Shahi, this is what you get…:S