Where have Online Dictionary?(free)

http://tw.dictionary.yahoo.com/(呢個我都用左好耐)
http://hk.dictionary.yahoo.com/
http://www.mytrans.com.tw/newMytrans/freeTrans/Freesent.aspx
(呢個仲可以譯日文同全句)
http://dictionary.cambridge.org/(呢個超好用,有英文meaning,有phonetics,有part of sppeech(eg.verb,adi,adv)仲有例句

http://hk.dictionary.yahoo.com/

Hi,
You may try these three links below:

http://www.m-w.com <----------American English-English dictionary online with sound clips.( Click on the red speaker icon beside the word and then you are able to hear the sound.)
http://www.dictionary.com<--------------English-English dictionary online.
http://www.tigernt.com/cgi-bin/cedict.cgi<-----Chinese-English .

About the third one, all you have to do is follow the instructions as follows:


1) Input( type in the Chinese word(s) here) AS <--Choose " GB"

2) Chinese output as " GB"
3) Where ( choose" anywhere in the field')
4) Hit " look up" and that's it.
5) It also shows the Mandarin phonetics in the field too.

Note:

You will not have to pay a penny for any of the websites above.

Don't worry about it, buddy.
Hope it helps.
Ciao