The new Roget's Thesaurus of the English language in dictionary form

The New Roget's Thesaurus in Dictionary Form is the most authoritative, efficient and thorough reference work on words that you could possess. And this edition contains thousands of new words, including colloquialisms, slang, and scientific terms. Each listing of a word contains synonyms which define it, and a cross reference to at least one other word. If you have ever racked your brains for a better word, a different word, an antonym, or a vivid descriptive phrase, you will find this book indispensable.