I understand what he's asking. Freedictionary is a popular reference website. He wants to know if there exists a mobi formatted book of the data on the website so he can read it on his Paperwhite. All he can find is the application for the Kindle Fire in the Amazon AppStore which won't work for the Paperwhite.
I would recommend accessing the freedictionary website through the experimental browser on the Paperwhite. Otherwise try the default dictionaries that come with the Paperwhite and see if they are good enough.
It's just that freedictionary is his favorite. That's all.
