Dictionary look up. Fast, light, open source (GPL) tool that define (using Wiktionary) words for you without need to open new tabs or extra windows.

Definition (from Wiktionary) of any word, in any language right under your mouse pointer:)

How to use:
· You have to press Shift at the beginning.
· Move mouse pointer just a bit, still holding it over selected word.
· Wait half a second.

The other way, moving mouse first and then pressing Shift will not work, to make sure add-on won't interfere, when user decided to type some text..

Requirements:

· Firefox 2.0 to 3.7a1pre

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

· Added setting for default language for native parser (useful for working with foreign languages).
· Fixed bug that made WikiLook crash from time to time.
· Fixed platform specific bug.
· Stability improvements.
· New multidiv interface.
· Integration with Wiki site browsing.
· Now WikiLook go for main word form even for languages different from English.
· Cosmetic changes.
· Smart search with non Latin characters fixed.
· Added support for gerund and feminines word forms.
· Lot bugs were fixed.
· Much improved rendering of non-English Wiktionaries.
· Improved rendering of non-English Wikipedias.