As it is the best (in fact the only fully functional) dictionary app in my experience. Supports almost all dict formats, pronunciation, global hotkey for un/minimize and scan popup etc.
Sorry, I'm not allowed to post URL as this is my first post, but googling for "goldendict" easily locates its web page.
Best regards... and (as I'm planning to try the forthcoming LXDE edition) thanks in advance for a distro which seems to be the best of all worlds.