Browsable dictionary?

I am looking for a dictionary that I can put on my laptop and take on vacation when I will not be online. The purpose is to be able to browse it the way you can browse in a paper dictionary for the purpose of finding unusual words for playing dictionary. So I need definitions (preferably short), but the usual lookup format is totally unsuitable. Does anyone know of such a thing? I am willing to pay money, but not a large amount.