Longman Dictionary of Contemporary English for advanced learners

230 000 words, phrases and meanings and 165 000 corpus-based examples
Register notes focus on the differences between spoken and written English so you always choose the right word
Longman Communication 9000: updated core vocabulary, including the 3000 most frequent words in spoken and written English, show which words to learn first
Clear, easy-to-understand definitions written using only 2000 common words