While dictionaries have always been crucial in the process of language learning, online dictionaries are introducing a whole new world of accesible information! Complete with forums, idioms, thesauri, and even encyclopedias in a variety of languages, these sites are a one-stop shop!
Here are a couple of my favorite that are particularly useful for English language learners:
The Free Dictionary
My favorite feature of The Free Dictionary is it’s industry specific dictionaries – it has medical, legal, and financial dictionaries.
Don’t let it’s plainness fool you – this is a powerful tool! With dictionaries in 15 languages, this is great for a multilingual class. It’s language forums are also very useful in dialogging about word meanings with native speakers.