M-day

noun
\ ˈem-ˌdā How to pronounce M-day (audio) \

Definition of M-day

: a day on which a military mobilization is to begin

First Known Use of M-day

1924, in the meaning defined above

History and Etymology for M-day

mobilization day

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Time Traveler for M-day

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The first known use of M-day was in 1924

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Dictionary Entries near M-day

MCW

Md

MD

M-day

MDC

MDD

mdewakanton

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Cite this Entry

“M-day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/M-day. Accessed 30 Sep. 2020.

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