I used to maintain a website that gives simple definitions for terms, before Wikipedia was well-known. It had integrated Google Search, specific to the site. I just checked now (the site is still up, though unmaintained for a decade and a half) and the Google Search feature in fact does not work anymore. I have no idea for how long that has been the case. I'm apprehensive about clicking the links to AskJeeves and Fark still on the sidebar!