Oxford Dictionary & Thesaurus
MobiSystems
English Dictionary English
LDieu
Dictionary.com: English Words
Dictionary.com, LLC
Oxford Advanced Learner's Dict
Oxford University Press ELT.
英汉字典 / 英英字典 / 汉英字典
Erudite
The English Dictionary
StudySwitch, Inc.
英英字典及翻译器 English Dictionary
Bravolol - Language Learning
英汉字典 | 汉英字典 English Dictionary
Advanced English Dictionary
S A Technalogies
剑桥词典 +Plus
Cambridge University Press & Assessment