HoverDict is an offline English dictionary accessible from a floating bubble which runs on top of your other apps. The concept is similar to chatheads used by Facebook messenger. You can look up word definitions while reading PDFs/e-books while browsing the internet and even while playing games.
FEATURES:
1) Offline dictionary based on the Wordnet lexical database with which you can look up the definition, type and usage of a word.
2) Audio pronunciations (Requires google's text-to-speech engine)
3) Share text to lookup its definition
3) Auto-search words copied to the clipboard
4) Invisible mode: The floating dictionary runs in the background. Just select and copy a word from any app and a floating widget will pop up with the word's meaning

PREMIUM VERSION FEATURES (Available as an IAP):
1) Urban Dictionary Plugin: Search for word meanings from Urban Dictionary
2) Google Search Plugin: Search for words on Google.


DEMO VIDEO:
https://www.youtube.com/watch?v=FQD3c-S9T_g