How to add additional dictionaries for iOS 7's define feature

[iMore.com]

The Define option in the iPhone and iPad text selector popup gives you dictionary definitions for most common words. It's convenient because it can be accessed in only a couple of taps. But what if you're in England and the U.S. dictionary keeps coming up? What if you also speak Italian or Japanese or Chinese and want to access those definitions as well? Luckily, iOS makes it easy to add and manage additional dictionaries so you can have the languages you want right where you want them!

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