Online Dictionaries

 
Online dictionaries:
 

http://dictionary.reference.com/

http://www.merriam-webster.com/

 
Online visual dictionaries:
 

http://visual.merriam-webster.com/index.php

http://www.infovisual.info/

 
 
You can also try Google Translate at the following website if you need the translation of something in your native language:
 

http://translate.google.com/

 
Enjoy!