NAVER Dictionary
NAVER Corp.
Oxford Dictionary & Thesaurus
MobiSystems
Dictionary.com: English Words
Dictionary.com, LLC
Oxford Advanced Learner's Dict
Oxford University Press ELT.
中文字典
TheFreeDictionary.com – Farlex
英漢字典 / 英英字典 / 漢英字典
Erudite
Dictionary - Merriam-Webster
Merriam-Webster Inc.
American Heritage Dictionary +