The cat will never get your tongue once you have The American Heritage® Dictionary of Idioms. This book defines nearly 10,000 idioms — expressions consisting of two or more words whose combined meaning is different from the literal meaning of the individual words. Each entry has both a definition and a sentence showing the idiom used in context. Most entries offer an explanation of the idiom’s origin and indicate when the expression first appeared in English.

本書包含了將近一萬個實用英文諺語，每一詞條都有詳細的解釋以及例句以供應用，此外，大部份的諺語都有其出處並注有其第一次被使用在英文中的時間。