"An American Dictionary of the English Language" is a comprehensive dictionary created by Noah Webster and first published in 1828. It aimed to standardize American English and distinguish it from British English, reflecting the unique culture and identity of the United States. Webster's dictionary included definitions, pronunciations, and usage examples for thousands of words. It also introduced American spellings, such as "color" instead of "colour." This work laid the foundation for future dictionaries and significantly influenced the development of the English language in America.