Answers.com is the first answer engine -- the ultimate online reference library, with quick accurate dictionary, thesaurus, encyclopedia, bios, tech terms, news, sports, weather, and much more. With 1-Click Answers, just Alt-click on any word in any Windows application (e-mail, browser, Office, and so on), and get a quick definition or explanation. Alternatively, type a topic into our AnswerBar. Mac version available as a separate download.