MSDict offers best experience in mobile reference and is available for any handheld platform.

Quick dynamic search of words while you type
Hyperlinks between different related words
Handy custom filters added to help you locate the word you are searching for:
Fuzzy filter- used when you are not sure of the correct spelling of a word
Keyword- used to locate the instances of a key word within other compound words
Wild card - "?" and "*" replace a letter and group of letters in words
Dynamic changing of font sizes
History lists of visited words
Support of multiple dictionaries installed at a time
Fullscreen support
Page scrolling mode added
Ability to select and change the language for MSDict menus and messages. The supported languages are- English, German, French, Spanish, Italian, Finish, Russian and Portuguese.
Copy single words, selected paragraphs or whole word definitions in external programs on your phone
Two different work modes- View and Selection for your convenience when browsing word definition

http://www.umnet.com/mobile-posts/1100-MobiSystems_MSDict_Viewer_7_02