AHD4American Heritage Dictionary of the English Language, 4th Edition
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These last, introduced in AHD4, illuminate how American English varies not only by region but by social group and over time.
The final comment in the AHD4 usage note reads "The Panel has no affection for the odd but occasionally heard phrase grow down: 98 percent reject If elected I shall do my utmost to grow down the deficit.
Like its forebears, AHD4 will feature writer-friendly Usage Notes -- updated, of course - based on observations made on surveys that are sent periodically to its 150+ member Usage Panel of experts.