Definr, a fast and free online search dictionary based on Princeton’s open WordNet 2.0 wording database. Meanwhile, Definr online search dictionary services is develop on Ruby on Rails framework which can looking up words in a dictionary data in light of speed.

To use Definr online search dictionary services , just simply enter your word into the Define Textbox then hit enter, Definr will show you the definition at the bottom of the page.

Definr online search dictionary can:

• cache the top 10,000 definitions in memory
• word completion/auto-suggest so you don’t have to search through 200,000 words for every keystroke

Beside that, Definr also introduce a Firefox extension to increase the online search definition meaning services.

Just simply download the Definr firefox extension and it will display the definr features like below pictures.
Download Definr Firefox Extension

Visit http://definr.com/ to try it out to search online word definition services.