Merriam-Webster Learner?s Dictionary for the ECCE / ECPE exams
[try the word ?hood?]
Macmillan Dictionary, particularly for phrasal verbs
[try the phrasal verb ?set up?]
Collins American English Dictionary
also for phrasal verbs
[try the phrasal verb ?wise up?]
Oxford Collocation Dictionary, for fixed expressions or words that commonly co-occur
[try the word ?prerequisite?]
COCA Corpus of Contemporary American English, how words are actually used
[try the word ?access?
the free dictionary for AmE / BrE pronunciations
[try the word ?iron? & ?entrepreneur?]
Dictionary.com for think maps
[try the word ?wiener?]
Online Etymology Dictionary for explanations of what English words meant
[try the word ?cretin? and you?ll be surprised when you see which word it?s derived from]
KDictionaries [Random House Websters] for quick translations of a specific English word into more than 40 languages, including Greek
try the word ?ventriloquist?
Merriam-Webster Collegiate for difficult explanations and encyclopedic articles
try the word ?ant?