This app was mentioned in 4 comments, with an average of 1.75 upvotes
I manage the Adaway host file.
I installed https://play.google.com/store/apps/details?id=org.leo.android.dict
and use NetGuard as well. (pro version) The only domain I see that this app connects to is mobile.leo.org which means they likely host their ads first party. As in, if I block mobile.leo.org it would block all of their web-based content.
Interesting tips!
One comment: I find LEO much better than dict.cc.