Define is a very easy to use Firefox and Thunderbird add-on that allows you to search the definition of the highlighted text at Google.

When there is highlighted text, a new option is added to the context menu. This option searches the definition of the highlighted text in Google (like searching "define:some_text").

Define add-on integrates quickly into your application and can be easily managed via the Add-ons window that you can access through the Tools menu.

Here are some key features of "Define":

The search results can be opened in:
· The current tab.
· A new tab.
· A new window.

Requirements:

· Firefox 1.5 to 3.6.*
· Thunderbird 3.0b1 to 3.1.*

What's New in This Release: [ read full changelog ]

· Added option to open new tab next to the current one.