Collins Cobuild Advanced American English Dictionary

This dictionary is ideal for upper intermediate and advanced learners of American English. It covers all the words, phrases and idioms that students need to learn and master to be able to speak and write effective American English. With full-sentence definitions written in simple, natural English, this dictionary is easy to use and understand. The examples, taken from the 4.5-billion-word Collins Corpus, show learners how the words are used in authentic contexts.

The dictionary offers a wealth of knowledge and provides extensive help with grammar, including grammar patterns and a grammar reference in the supplement. A wide range of vocabulary building features, many of them with full-colour illustrations, encourage students to expand and improve their accuracy and fluency.
The dictionary also includes an Activity Guide, which helps students learn how to get the most out of the dictionary; a Writer's Handbook, which gives guidance on spelling, punctuation, letter-writing and CVs, and a Speaker's Handbook, which gives advice on the best set phrases to use in key situations.
The Collins COBUILD American Advanced Dictionary provides invaluable and detailed guidance on the English language, and is the complete reference tool for learners of American English.