M-day

noun
\ ˈem-ˌdā \

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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Dictionary Entries near M-day

MCW

MD

Md

M-day

MDC

MDD

mdewakanton

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Time Traveler for M-day

The first known use of M-day was in 1924

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