I skimmed through Livio web-site and it seems like it's just a repacked wiktionary?

On my e-book I use KOReader and I uploaded dictionaries of my personal choice on it. When I see a new word, I hold a finger for a bit longer than usual and KOReader opens a modal window with a definition from Cambridge Advanced Learner's Dictionary. It took some time to find a DRM-free version and convert it into StarDict format but I've done it so I can share you only need to use this Python script: https://github.com/ilius/pyglossary. I'm sure there's already a wiktionary stardict on the web and you won't need pyglossary.

KOReader can be installed on many popular e-readers, including jailbroken Kindles (this usually takes 10 minutes to do depending on Amazon mood).