The revolutionary achievement of Dr. Peter Mark Roget’s first edition in 1852 was the development of a brand-new principle: the arrangement of words and phrases according to their meanings. Dr. Roget’s system brings together in one place all the terms associated with a single thought or concept; it allows a wide-ranging survey of language within a book of relatively modest size, without the space-consuming repetitions that so severely limit the scope of thesauruses arranged in a dictionary format with A-to-Z entries. This brilliant organization makes Roget’s International Thesaurus both the most efficient word finder and a cutting-edge aid in stimulating thought, organizing ideas, and writing and speaking more clearly and effectively.

This revised and updated seventh edition features thousands of new words and phrases, including the newest slang words and expressions that color and inform everyday language. At the same time, it retains all the hallmarks that have made Roget’s International Thesaurus the most popular word reference book next to the dictionary.