Freebee Dictionary

I stumbled on a Dictionary program, which, far as I can see is free, and doesn't appear to do anything nasty to your computer. You just highlight the word, press the magic button, and it tells you what it means. And it lists synonyms + other bits of speech too.

This is the website - http://wordweb.info/free/

It's American English, but seems to recognise our quaint dialect too. Quite a big download, but hours of word swallowing fun ensues.