Dictionary.com
Thesaurus.com

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:

If the young were the M-day vanguard, many in the ranks wore the housewife's apron and the businessman's necktie, and many who clambered to enlist were political leaders.

From Time Magazine Archive

New York provided an extraordinary juxtaposition of moods as the Mets won the World Series the day after M-day.

From Time Magazine Archive

The New York Times and the Wall Street Journal gave employees time off to support M-day.

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

When M-day came to WPB last week, Donald Nelson faced a dilemma of his own making.

From Time Magazine Archive

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training