Book excerpt: Hundreds of words and expressions enter American English every year. Many of these words wither and die before being written or spoken by more than a handful of people, but a respectable number survive. As the language changes, expanding to make room for new words, including slang, words borrowed from other languages, acronyms, and jargon, Oxford lexicographers are there, taking notes and writing definitions. A perfect companion to any dictionary, this book has more than 2500 new words and definitions, presented with the precision and accuracy that readers expect from Oxford, the most trusted name in reference. Book jacket.