WordWeb for iPhone and iPod Touch
Available on the iTunes App Store:
- Up-to-date international English dictionary, based on WordWeb
- Fast, simple navigation
- Synonyms and many usage examples
- Over 222,000 word senses, 370 000+ words including derived forms
- Includes many proper nouns, compounds and phrases
- Bookmark and recent words list
- Full coverage of American, British, Canadian, Australasian and Asian English
- Works offline
You may also be interested in Word Find, a powerful iPhone application for pattern searching in the WordWeb word list (and Wikipedia).