Google has added a new "mode" to the Google Translate service:
Google's automatic translation is handy for getting translations of complete sentences, paragraphs, and documents. But when you need to translate a single word, a bilingual dictionary can be very useful because it gives you translations for the many possible meanings a word might have.
Source: Official Google Blog
You can take the new feature for a spin here. I've already added the support for the new service to the latest development release of Writer's Tools (available in the SVN repository).