英語-漢語字典 
http://dictionary.cambridge.org/zht/%E8%A9%9E%E5%85%B8/

http://dictionary.cambridge.org/zht/%E8%A9%9E%E5%85%B8/%E8%8B%B1%E8%AA%9E-%E6%BC%A2%E8%AA%9E-%E7%B9%81%E9%AB%94/
 英英字典 

https://www.oxforddictionaries.com/

https://en.oxforddictionaries.com/