OALDict - Oxford Advanced Learner's Dictionary app for iPhone and iPad

The advanced learners dictionary is the most common type of monolingual learners dictionary, that is, a dictionary written for someone who is learning a foreign language and who has a proficiency level of B2 or above according to the Common European Framework. It differs from a bilingual or translation dictionary, on the one hand, and a standard dictionary written for native speakers or linguistic scholars, on the other.

this is a dictionary you can:
-search a word or idiom english
- listening word or idiom with US voice or UK voice
- bookmark a word or idiom
- history search