DMAU meaning in General ?

Garner's Modern English Usage (GMEU), written by Bryan A. Garner and published by Oxford University Press, is a usage dictionary and style guide (or 'prescriptive dictionary') for contemporary Modern English. It was first published in 1998 as A Dictionary of Modern American Usage, with a focus on American English, which it retained for the next two editions as Garner's Modern American Usage (GMAU). It was expanded to cover English more broadly in the 2016 fourth edition, under the present title. The work covers issues of usage, pronunciation, and style, from distinctions among commonly confused words and phrases to notes on how to prevent verbosity and obscurity. In addition, it contains essays about the English language. An abridged version of the first edition was also published as The Oxford Dictionary of American Usage and Style in 2000.