If you are a regular user of the website http://www.dictionary.com/, you must have experienced that it has been evolving from time to time. The services it provides are absolutely very useful. It is a free dictionary available online. The company survives by advertising. They have really thought about user preferences and I think they have studied about the psychology to a greater extent. Having the home page (http://www.dictionary.com/) with one big advertisement and only the search box is a very good tactic. I myself spent some time reading the advertisement before I started typing.