This book combines the text of the "Collins Gem Dictionary and Thesaurus" with the format of the "Pocket" range of books. The dictionary contains short explanations of the core words of the language, those most likely to be looked up. Its coverage includes recently established words such as fax, wally and wimp and new uses such as the drug sense of words such as crack and the pop music sense of rap. Twinned with the dictionary and appearing below it is a thesaurus, providing readers with a choice of alternative words to main and subsidiary entries in the dictionary.