Jean Parrot -> August Abolins said..

 AA>> I use a simple stand-alone program called WordWeb. More
 JP> info here: AA> http://wordweb.info I'm still using the FREE
 JP> version.

 JP> This one look good, so far, I have it installed and I used it
 JP> a little, I like the TSR status. I copied the .exe icon to my
 JP> task bar and will be able to use it at will. I will let you
 JP> know how it pans out.

The TSR type of behaviour is truly handy, eh?  It seems to work in any
application and when I need to look up a word on a website.

--- Thunderbird 2.0.0.24 (Windows/20100228)