Noah Webster was an American lexicographer, textbook author, English-language spelling reformer, political writer, editor, and prolific author. He is best known for his 'American DICTIONARY of the English Language', which has been described as one of the greatest single achievements of scholarship. He wrote extensively on many other topics, including foreign languages, religion, history, and economics. He also wrote a number of books on grammar and usage, including 'A Grammatical Institute of the English Language'. Webster's name has become synonymous with 'DICTIONARY' in the United States, and his name is often used as a synonym for 'DICTIONARY' in other countries.