"A Dictionary of the English Language" is a comprehensive reference work that provides definitions, pronunciations, and usage examples for words in the English language. First published in 1755 by Samuel Johnson, it is considered one of the first modern dictionaries and set a standard for future lexicography. The dictionary includes not only definitions but also etymologies, illustrating the origins and historical development of words. Johnson's work was notable for its literary quality and attention to detail, influencing subsequent dictionaries and contributing to the standardization of English vocabulary and grammar.