This is a 95 page English to Quenya dictionary which was compiled by Helge K. Fauskanger for ambar-eldaron.com. While it is not so extensive as a Webster, it is nonetheless an interesting insight into the Elvish language and contains hundreds (thousands?) of entries, including different ways to use words in different situations.
It is a 1.7MB file. But whether you download it to your computer or just keep opening it from my blog, it’s definitely a good book to be aware of on The Paladin Project’s bookshelf!