Dictionary.com for PC is a great way to look up words and definitions, and even synonyms. There are over 2,000,000 word meanings and definitions in this app and the best thing about this app is that, it even works offline. The app even gets daily updates about the word of the day, has a blog function and even has slideshows.
One can also opt for audio pronunciations, and access a huge list of phrases and idioms. You can even look up word history and origin, and there is a voice search feature too in this app. The app stores the search history of users, and also makes a list of all your favorite words. When you are typing, the app also provides spelling suggestions and even assists with phonetic pronunciations. There is also a feature of medical, financial and legal content, and one can even look up abbreviations and antonyms.