One part of Google's search engine that many use quite regularly is the define:term aspect. This, as you can see, will define the term entered for the user. Now, Google's extended this by creating a dedicated dictionary portion of their site, compatible with a range of languages.
According to the LA Times, this new dictionary service pulls descriptions of words from a number of places, and even provides definitions from Wikipedia. This adds to Google's own database of word definitions, which is perfectly capable just by itself. As Mashable notes, the service has 28 different languages listed, which include English, Italian, French, German, Spanish, Chinese, Portuguese, Czech, and even Dutch, just to name a portion of them. This new site will be bad news for Answers.com, as previously, words defined by Google linked to the appropriate page on that site. Now, those links have been removed, and Google's service is now in its place.
If you'd like to give this a whirl, head to the Dictionary page and try some terms. You can even search for Google, which provides some ways to use the term 'Googling', such as, "He googled the woman he had met at the party," or, "My children are googling all day."