This is the fiftieth anniversary printing of The American Heritage® Dictionary of the English Language. This beloved dictionary has become the premier resource for anyone who wants to know precisely what words mean, where they come from, and how to use them effectively. It is renowned for presenting accurate and comprehensible definitions, etymologies based on the latest research, and authoritative usage guidance from the celebrated American Heritage Usage Panel. The fifth edition of the dictionary, published in 2011, included 10,000 new words and senses, as well as 4,000 new full-colour images. This comprehensive update continues the tradition of exhaustive research and thorough review. Thousands of revisions to definitions and etymologies, 150 new words and senses, and new usage advice make this updated printing the most current print dictionary of its size available today. The American Heritage Dictionary combines clear, precise definitions with useful features that make it easier to choose your words and express yourself clearly. Your words really do define you. Make the most of them with the guidance of this respected work of reference.