Use the Web's most popular dictionary to look up words within your application. Provides access to the Dictionary.com dictionary, thesaurus, slang, word of the day and more. Only non-commercial applications are allowed and API keys are reviewed.
One of the most valuable resources of the english language is the dictionary. I won't get into the history of the dictionary or what it's done for literal society. I will note that incorporating inline definitions into reading apps is not the easiest thing to do. Sure, we now have eReaders like Apple's iBooks and the Amazon Kindle that have dictionary integration built in, but what about the rest of of the text-based universe?