A dictionary??

Hi,
We're reading Wuthering Heights at school, and as I'm German I often have to look up a word in a dictionary. I wondered if there is something like a Oxford Dictonary portable, where you can just type a word in and you get an explanation of it??
I know, I could just use the psp-browser to look it up on the oxford dictionary homepage, but in many places you have no wifi...
I think programming such a program isn't very hard but getting a good database with many words in it might be very difficult, but perhaps there are some free dictionaries in the internet you can download??

Try Ace Dictionary for psp it has a crappy database
but if im not mistaking you can modify it

Thanks for your quick reply.
This program is actually nice, but you're right the database is rather small...
Does this program have a search-function? Selecting athe first letter with the analog stick is rather weird...