Here’s an app virtually every iPhone/iPod Touch user should install on its beloved device. It’s Dictionary.com’s recently launched application, which features more than 275,000 definitions and 80,000 synonyms (from Roget’s New Millennium Thesaurus of English Words and Phrases – Thesaurus.com), as well as the website’s popular “Word of the Day” feature. Moreover, there are audio pronunciations, similarly spelled words, alphabetical indexing, example sentences, non-standard uses, word origin and history, and editable recent word look-up.
Finally, and this is where it gets really interesting — Dictionary.com works even while offline, allowing you to find definitions and synonyms without an Internet connection! As I said, it’s a must have – AppStore link is here.