H hour

noun

Definition of H hour 

: the hour set for launching a specific tactical operation

First Known Use of H hour

1918, in the meaning defined above

History and Etymology for H hour

H, abbreviation for hour

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Dictionary Entries near H hour

hheth

HHG

H hinge

H hour

HHS

HI

hi

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Time Traveler for H hour

The first known use of H hour was in 1918

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