The 9th edition of the Collins COBUILD Advanced Learner's Dictionary has been revised and updated to include detailed coverage of today's English. Ideal for upper intermediate and advanced learners of English, this dictionary covers all the words, phrases and idioms that students need to master in order to speak and write effective English. Thousands of updated examples show learners how the words are used in authentic contexts. The dictionary offers extensive help with grammar through the inclusion of grammar patterns at examples, plus a new supplement to help with academic and business grammar.