User blog comment:Northstar1012/Japanese Translations/@comment-973828-20100901170608

http://www.englishjapaneseonlinedictionary.com/

Has detailed definitions so you know what to look for, but it only gives romaji in the beginner's textbook form. Combining this with a more conventional machine translator would help.

I also use http://romaji.org/ for hiragana to romaji translations.