At last—a revolutionary state-of-the-art thesaurus that puts scores of synonyms at your fingertipsRevised and Expanded 3rd EditionROGET’S 21st CENTURY THESAURUS IN DICTIONARY FORM Combining scholarly authority with a new awareness of today’s communication demands, Roget’s 21st Century Thesaurus is the simple, reliable way to find the perfect word for your needs. It features an easy-to-use dictionary format plus a revolutionary Concept Index that arranges words by idea, thus enhancing the user’s process of association and leading to scores of additional selections.