This dictionary has been compiled with constant reference to the Bank of English, a unique database containing over 524 million words of written and spoken English, enabling Collins lexicographers to analyse how the language is actually used and how it is changing. The Bank of English was set up as a joint initiative by HarperCollins Publishers and the University of Birmingham to be a resource for language research and lexicography. It contains a very wide range of material from books, newspapers, radio, TV, magazines, letters and talks, thereby reflecting the whole spectrum of English today. Its size and range make it an unequalled resource, and the purpose-built software for its analysis is unique to Collins dictionaries.