Block Dictionary is described as 'dictionary that focuses on cryptocurrency terminology. Definitions are user submitted and are voted upon by the community to determine accuracy' and is an website in the Bitcoin & Cryptocurrency category. There are six alternatives to Block Dictionary, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad. The best alternative is Urban Dictionary, which is free. Other great sites and apps similar to Block Dictionary are The Online Slang Dictionary (Free), Dream Cloud Middle Men (Free Personal), Hinglish Dictionary (Free) and Slang-Dictionary.org (Free).