This title includes the following features: 40,000 references.; 'Short Cuts' in long entries to help find the right definition quickly.; 'Core' vocabulary highlighted to enable learners to concentrate on the most frequent words.; Example sentences based on a 100-million-word corpus ofAmerican English, reflecting contemporary usage.; Over 2,000 notes build learners' vocabulary and prevent common errors.; Illustrations depict difficult words or groups of related items.; 32 study pages on topics of particular interest in North America, as well as practice of language and studyskills.