Longman Advanced American Dictionary (with audio) 1.4.1

the author of this app says:

The dictionary for academic success.
A must for every serious student of English!
Patricia A. Richard-Amato, Professor Emeritus, California State University, Los Angeles

Every headword pronounced. 25,000 audio recordings to help you learn the correct pronunciation.
Full color text, zoomable illustrations and extensive sound files make the Longman Advanced American Dictionary ideal for use on your iPhone.
Full contents of the Longman Advanced American Dictionary
185,000 words, phrases and meanings
73,000 natural examples show words in context
Thesaurus boxes with 10,000 synonyms, antonyms, and related words
5000 etymologies help you learn the origins of words
6,000 new words for school content such as Science and Social Science
5,000 verb conjugation tables
Full color technical illustrations with zoom function
3,000 most frequent words in spoken and written English highlighted
Search history and book mark facility
Progressive look-up for quick searching
Academic wordlist highlighted to help you understand high-level academic texts

Requirements

Requires iPhone OS 2.2 or later.