SynoDef English is an application that offers over 82000 Definitions and 36000 Synonyms for the French language.
The Dictionary is offline and does not need an internet connection.

Fonctionnalities :

• Browse definitions and synonyms easily thanks to an elegant and functional design
• Add your favorite definitions and synonyms to your favorites to easily find them later
• Copy and Share a definition / synonym in a few clicks
• Find the definition / synonym easily thanks to the search function
• Personalize your experience by using the Preferences menu that allows you to:
    - Choose between themes: Normal, Light and Dark
    - Adjust the font size
• See definitions and synonyms without connection

The application is still being improved and there will be many features to add in the future :)