The ultimate language reference. for American readers

The Oxford Dictionary and Thesaurus combines a full dictionary and a full thesaurus, offering users access to the power of words as never before. This is the most wide-ranging resource available: a first-of-its-kind refer-ence book that's much more than a dictionary and thesaurus under one cover. Everything you'd find in a dictionary is here along with everything you'd find in a thesaurus, all thoroughly integrated for ease of use.

Plus, each synonym is precisely matched to the correct meaning of the word you're looking up so that you'll find the right word every time.

In addition to parts of speech, pronunciation, variant spellings, grammar notes, and synonyms, The Oxford Dictionary and Thesaurus includes a wealth of valuable appendices, covering:
The history of the English language, points of English usage.
geological eras, weights and measures, Celsius and Fahrenheit comparisons, chemical elements, selected proverbs, musical nota-tion, architecture