From itunes.apple.com - April 26, 2012 11:00 PM

Features:
* English Dictionary and Thesaurus - over 2,000,000 definitions, synonyms & antonyms
* Offline access – no Internet connection needed for most content
* Daily content, including Word of the Day & The Hot Word
* Audio pronunciation
* Example sentences
* Word origin & history
* Voice search (five free searches included)
* Favorite words
* Search history
* Spelling suggestions
* Popular & local trending searches
* Shake your iPhone to receive a random, surprise word