****Note : Free Trial has all the features!!!
EZDictionary is an educational Dictionary app which:

Contains 4 Distinct Dictionaries:
1) A Global Dictionary that supports nearly 100 languages
2)An English To English Dictionary which provides Definitions, Examples, Hyphenations, Pronunciations, Different Audios, Related Words (Synonyms, Antonyms, Same-Context , Cross-Reference and much more ...).
3) A English-Persian Offline Dictionary with live Translation
4) A Persian To Persian Dictionary.
All supports Saving favorite words, history, Drag and drop ,Paste ...
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And the app also provides :

-Language necessary IELTS Vocabularies and hundreds of related questions and Idioms to improve your English Language.

-Word Of the day.(also shown on Live Tiles).

-Floating Translator! Available everywhere in the app.

-The application will ask you questions and show you Vocabularies and Idioms on a regular basis with Completely Interactive toast notifications which can be answered without opening the application.

-Users can add and delete their own Vocabularies or Questions or Idioms FlashCards.
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Cortana :
You can progress your career and do translations with Cortana even from outside of the app :
- English to English or English to All the other languages Translations by Cortana.
- Requesting Random Vocabulary from Cortana
- Requesting Random Question from Cortana
- Requesting Random Idiom from Cortana
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-Changing Color and Theme
-Drop text support.
-Word Prediction for English words.
-Share items of packages
-Translate from outside of the app using share