oh dark thirty

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See also: oh-dark-thirty

English

Alternative forms

Etymology

From U.S. military terminology, in which hours before 10:00 am are prefixed with a zero, read as "oh", as in 0530, oh five-thirty, for 5:30 am.

Pronunciation

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Noun

oh dark thirty

  1. Some unspecified hour in the early morning (implies an unpleasant time to be awake).
    I had to get up at oh dark thirty to catch a plane.

Synonyms

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