Collins COBUILD Advanced Learner's English Dictionary offers detailed treatment of today's language. Based on the evidence from the Bank of English corpus, which now contains over 524 million words, the fifth edition contains the most important new words and meanings which have come into the language over the past two years, as well as thousands of new, updated examples, taken directly from the corpus.

Through a collaborative initiative, Collins COBUILD and Heinle are co-publishing a dynamic new line of learner's dictionaries offering unparalleled pedagogy and learners' resources. The first Collins COBUILD dictionary was published in 1987, thanks in part to John Sinclair, one of the very first modern corpus linguists who personally oversaw the creation of the Bank of English. Every COBUILD dictionary is based on the Bank of English, a huge electronic database of both written and spoken language, which today contains over 650 million words.

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