Noah Webster, an influential American lexicographer, is best known for creating the first comprehensive dictionary of American English, which he copyrighted on April 14, 1828. This significant work aimed to standardize American English and distinguish it from British English, reflecting the unique linguistic identity of the United States. Webster's dictionary included not only definitions but also phonetic spellings, which were intended to make the language more accessible to everyday users. His efforts were part of a broader movement to cultivate a distinct American culture and identity in the early 19th century. By copyrighting his dictionary, Webster sought to protect his intellectual property and ensure that his comprehensive work could be used widely without unauthorized reproduction. The dictionary has since played a crucial role in shaping the English language as it is used in America today, influencing both education and communication. Webster's contributions are recognized as foundational in the evolution of American English, making his work significant for historians, linguists, and educators alike.