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M-day

American  
[em-dey] / ˈɛmˌdeɪ /

noun

Military.
  1. mobilization day: a day assumed by the Department of Defense as the first day of mobilization, used by the military for planning purposes.


Etymology

Origin of M-day

First recorded in 1935–40

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

The Detroit News concluded that M-day had probably encouraged the enemy but added that it had also "served as a national safety valve for the venting of frustrations, legitimate and otherwise."

From Time Magazine Archive

What M-day did raise was an unmistakable sign to Richard Nixon that he must do more to end the war and do it faster.

From Time Magazine Archive

Knox, who admits to having had other disputes with the paper's management, decided on his own to mark M-day with a front-page list of the Waterbury-area war casualties.

From Time Magazine Archive

San Francisco State College President S. I. Hayakawa, a hero to California conservatives for his rhadamanthine handling of student demonstrators in the past, serenely denied that M-day was being observed on his campus.

From Time Magazine Archive

Yet M-day 1969 was a peaceful protest without precedent in American history because of who the participants were and how they went about it.

From Time Magazine Archive

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