I have a vague recollection of reading somewhere that you're explicitly forbidden from creating a dictionary app using the OS dictionaries. You can do dictionar

I have a vague recollection of reading somewhere that you're explicitly forbidden from creating a dictionary app using the OS dictionaries. You can do dictionary lookup within apps (so, for example, you're free to use the dictionary to look up definitions in your word processor or ePub app, but not to have an app which lets a user enter a word and get a definition back).