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M-day
[ em-dey ]
noun
, Military.
- mobilization day: a day assumed by the Department of Defense as the first day of mobilization, used by the military for planning purposes.
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Word History and Origins
Origin of M-day1
First recorded in 1935–40
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Example Sentences
John M. Day, Morris Township, was a good-hearted man, but seemed physically unable to withstand the hardships of active service.
From Project Gutenberg
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