The American Heritage Dictionary is a widely respected reference book that provides definitions, pronunciations, and usage examples for words in the English language. First published in 1969, it is known for its clear and accessible explanations, making it a popular choice for students, writers, and anyone looking to improve their vocabulary. In addition to definitions, the dictionary includes information on word origins, synonyms, and grammatical notes. It is often praised for its editorial approach, which emphasizes the importance of language as it is used in everyday life, reflecting the evolving nature of American English.