Oh don't get me wrong there are still options on the dictionaries to go back and forth from languages, I'm just pointing out that the majority of the dictionaries were more exclusively made in mind of the Japanese consume giving broader Japanese explanations and options. You can follow this topic more closely at this website here:
Tokyo Tsure Zure Gusa
Which is also an excellent blog website to help make the right choice in buying your first Electronic Dictionary. I ended up going with the Casio my self (Although all the menus are in Japanese thick with Kanji).
There are even cheaper avenues of approach such as the Nintendo DS Kanji Dictionaries like "Sonomama Rakubiki Jiten". Which although has very limited definitions, it also has one of the finest written Kanji recognition AIs I have ever used! (any thing to help my bad penmanship