- Dictionary contains over 25000 references and over 40000 definitions.Thesaurus contains over 10000 entries and over 135000 synonyms in easy A to Z dictionary format, this is the perfect reference source for everyday usage at home, school, and in the office. Completely up-to-date with idioms and slang, ideal for both the spoken and written word, this is an invaluable tool for better word comprehension and usage.