Online Dictionary

http://dictionary.cambridge.org 

http://www.merriam-webster.com 

http://www.english-dictionary.us 

http://dictionary.msn.com 

http://www.bartleby.com/61 

http://www.allwords.com 

http://www.oed.com 

http://www.wordsmyth.net 

http://www.yourdictionary.com 

http://www.wordreference.com 

http://humanities.uchicago.edu/forms_unrest/FR-ENG.htm 

  http://www.thefreedictionary.com 

http://www.tigernt.com/dict.shtml 

http://www.askoxford.com 

http://dict.tu-chemnitz.de 

http://www.onelook.com 

http://www.shabdkosh.com