When I read on my Kindle, I can simply highlight a word to get its definition. When I read a paper book, this doesn't work. I'm looking for an app on my phone that allows the following: (1) I ask it for the definition of a word; (2) it speaks the definition to me. This allows me to only minimally interrupt the flow of my reading.
Some things that are important to me:
- Should work on both iOS and Android;
- Ideally accepts lots of esoteric words (like turophile);
- Ideally is "always on" and can be cued by saying some variant of "define [word]" (like Google's "OK Google");
- Best would be cheap/free.