New Oxford American Dictionary

　　The New Oxford American Dictionary gives the most accurate and richly descriptive picture of American English ever offered in ay dictionary. Backed by the most extensive language research program in the world, including Oxford’s 200-million-word data bank of English, and the unrivaled citation files of the world-renowned Oxford English Dictionary, lexicographers have examined fresh evidence of language and usage to establish the definitive American language resource.

˙For unprecedented clarity, all entries show the main meaning or meanings of a word first, with definitions written in plain, jargon-free English
˙Contains more than 250,000 definitions, with clear pronunciations and useful syllable breaks, and 9,000 biographical entries.
˙Covers the new words you want to know about, from areas as diverse as computers, medicine, science, and politics to popular culture, with new terms ranging from clickstream to undervote, dumpster diving to LASIK surgery.
˙Language guidance based on real evidence ensures precise, confident usage, with clear labels on words and senses, hundreds of usage notes, and clarification of controversial or difficult areas
˙Thousands of detailed illustrations immediately clarify difficult concepts
˙Unrivaled etymological information reveals fascinating word histories that are fun to read