- Best Online Dictionaries for English Language Learners

Useful Websites and Software for English Language Learners (TESOL)

1) Cambridge Online Dictionary 

Free Online English Dictionary, Thesaurus, Word of the Day, Pronouncing Dictionary and other language resources from Cambridge University Press.

Link: http://dictionary.cambridge.org/dictionary/british/learner?q=learners#learner__3

2) Merriam Webster Online Dictionary

Free online dictionary, thesaurus, spanish-english and medical dictionaries, audio pronunciations, Word of the Day, word games, and many more high-quality 

Link: http://www.merriam-webster.com/dictionary/learners

3) Dictionary.com

Dictionary.com - the largest and most trusted free online dictionary. Quickly find accurate definitions and audio pronunciations of words.

Link: http://dictionary.reference.com/browse/learners

Dictionary.com is for Advanced Learners