Oxford American College Dictionary & Oxford Americ The world's most trusted dictionary plus thesaurus in one.
Based on a database of over 200 million words, this combined dictionary and thesaurus offers the most comprehensive coverage of American English.
The dictionary features more than 400,000 entries and definitions. The thesaurus is the first place to look when you need just the right word. It includes antonym lists with cross references to other main entries; plus Synonym Studies that