The entire 2,074 page, $29.99 pound dictionary with its nearly 300,000 terms –plus 64 thousand recorded sound files all available instantly at your fingertips.
This iPhone/iPod touch version has the entire 2,074 page, 7.5 pound dictionary with its nearly 300,000 terms –plus 64 thousand recorded sound files by native speakers– all available instantly at your fingertips.
More than 33,000 written examples, totaling 4,222,000 words, makes this largest mobile dictionary on ANY platform
The indexes alone are larger than most brand-name dictionaries. Even without the sound files, AHD4 would still be over 100MB and the largest dictionary in the AppStore.

Key Features:
- entire text of this best selling book
- complete front matter and appendicies
- three-way cross-referencing search
- real-time progressive look-up
- wildcard searches for crosswords or spelling
- internal hyperlinking & supports copy/paste
- pop-up pronunciation symbols chart
- IPA pronunciation symbol conversion
- etymology (word history) with root links
- professionally recorded sound files
- zoomable graphics
- unique two-way external application interaction
　 — only iPhone dictionary with external linking!
- bookmarks with editable notations
- automatic search history
- complete offline use - no Internet connection