TheFreeDictionary.com

Merriam-Webster Dictionary

merriam-webster.com

Cambridge Dictionary

cambridge.org

Dictionary.com

dictionary.com

Thesaurus.com

thesaurus.com

Urban Dictionary

urbandictionary.com

Oxford Learner’s Dictionaries

oxfordlearnersdictionaries.com

Macmillan Dictionary

macmillandictionary.com

WordReference

wordreference.com

Wiktionary

wiktionary.org

Power Thesaurus

powerthesaurus.org

SpanishDict

spanishdict.com

Word Hippo

wordhippo.com

Collins Dictionary

collinsdictionary.com

dict.cc

dict.cc

Forvo

forvo.com

Graphwords

graphwords.com

WordFinder

wordfinder.com

YourDictionary

yourdictionary.com

Synonyms.com

synonyms.com

Etymonline

etymonline.com

Definitions.net

definitions.net

Lexilogos

lexilogos.com

goo辞書

dictionary.goo.ne.jp

Oxford Dictionaries Premium

premium.oxforddictionaries.com