If you are looking for a definition on the Google Dictionary, unfortunately the service is no longer available.
The Google Dictionary page now features the message, "Google Dictionary is no longer available. You can use Google web search to find definitions or Google Translate for your translation needs."
In the recent times, this is yet another service that Google seems to have pulled the plug on.
Could this close down be as a result of the recent nudity incident, that earned it a bad name?
However, Kelly from Google explains the reason reason behind terminating the dictionary in the Google Search Help forum
This news certainly does not seem to have gone well with Google users, as the post seems to have attracted over 367 comments, of which most of them are negative.
Despite the demand for it, I highly doubt though Google will breath back life into this service too, like there are indications of the Google Realtime Search returning.