Roget’s International Thesaurus®, fifth edition, is the original — now completely expanded, reorganized, revised and updated — the definitive thesaurus for the 21st century.

While retaining Dr. Peter Mark Roget’s fundamental and brilliant category concept which groups all synonyms, antonyms and related words together for quick and easy comparison without all the needless repetition and cross referencing of alphabetical thesauruses, this new fifth edition is:

• the most up-to-date — with 1073 categories including 31 entirely new ones concerning such topics as the body, fitness and exercise, substance abuse, all kinds of sports, books, motion pictures and computer science

• definitive — based on extensive word association research into how words are actually used, resulting in the most current reflection of the language today and including the latest phrases, slang and commonly used foreign terms

• the most comprehensive thesaurus available — 325,000 words and phrases

• an invaluable source book with many additional features — boldface type for the most commonly used words in a category, usage and foreign language labels throughout and a unique and useful feature of word lists including lists for measurements, gods and goddesses, manias and phobias, groups and movements, state mottos and more

• time-tested — this definitive, updated edition retains the original time-tested format that allows much more depth of information