Things are a little slow today and I was tired of not having some type of plug-in for looking up the definition of words while reading so I decided to cook up my own real quick.
Give it a shot:
PS: You might have to install a beta version of chrome first.
It’s pretty basic, you just select some text in the browser and a little book icon shows up in the address bar. If you click it, it will open a new tab for you at dictionary.com with the selected text already searched for. Nice and simple.