dark thirtyn.

Brit.

/ˌdɑːk ˈθəːti/, U.S.

/ˌdɑrk ˈθərdi/

Forms:

α. 1900s– dark thirty.

β. 1900s– zero dark thirty.

γ. 1900s– o dark thirty, 1900s– oh dark thirty.

Origin: Formed within English, by compounding. Etymons: dark adj., thirty n.; zero n., dark adj., thirty n.; O n.³, dark adj., thirty n.

Etymology: In α. forms < dark adj. + thirty n. In β. forms < zero n. + dark adj. + thirty n. In γ. forms < O n.³ + dark adj. + thirty n. All form-types arise as alterations of expressions indicating a time in the very early morning, as e.g. three thirty , 04.30 , etc. (compare thirty adj. 2b); compare e.g. stupid o'clock at o'clock adv. 1c.

U.S. (originally Military slang).

A period of time occurring before dawn; an unspecified hour in the very early morning. Also more fully o dark thirty, oh dark thirty, zero dark thirty. In fuller form zero dark thirty, widely popularized by the title of the 2012 U.S. film Zero Dark Thirty.

ΚΠ

1960 Bryan (Texas) Daily Eagle 28 Apr. 12/6 (advt.) Lucian Reed Auto Sales... Open evenings till dark thirty.

1990 Vogue Jan. 32/1 Saddle up at zero dark thirty.

1994 J. V. Potter in Mil. Ethics 185 That mission may call for an ‘o-dark-thirty’ takeoff in marginal weather.

2000 J. T. Callahan Different World 1961 24 See you at oh-dark-thirty for the mission briefing.

2018 @FishingSkills 1 May in twitter.com (O.E.D. Archive) Gone #fishin', be back at dark-thirty!

This entry has been updated (OED Third Edition, December 2021).

单词	dark thirty
释义	dark thirtyn. Brit. /ˌdɑːk ˈθəːti/, U.S. /ˌdɑrk ˈθərdi/ Forms: α. 1900s– dark thirty. β. 1900s– zero dark thirty. γ. 1900s– o dark thirty, 1900s– oh dark thirty. Origin: Formed within English, by compounding. Etymons: dark adj., thirty n.; zero n., dark adj., thirty n.; O n.³, dark adj., thirty n. Etymology: In α. forms < dark adj. + thirty n. In β. forms < zero n. + dark adj. + thirty n. In γ. forms < O n.³ + dark adj. + thirty n. All form-types arise as alterations of expressions indicating a time in the very early morning, as e.g. three thirty , 04.30 , etc. (compare thirty adj. 2b); compare e.g. stupid o'clock at o'clock adv. 1c. U.S. (originally Military slang). A period of time occurring before dawn; an unspecified hour in the very early morning. Also more fully o dark thirty, oh dark thirty, zero dark thirty. In fuller form zero dark thirty, widely popularized by the title of the 2012 U.S. film Zero Dark Thirty. ΚΠ 1960 Bryan (Texas) Daily Eagle 28 Apr. 12/6 (advt.) Lucian Reed Auto Sales... Open evenings till dark thirty. 1990 Vogue Jan. 32/1 Saddle up at zero dark thirty. 1994 J. V. Potter in Mil. Ethics 185 That mission may call for an ‘o-dark-thirty’ takeoff in marginal weather. 2000 J. T. Callahan Different World 1961 24 See you at oh-dark-thirty for the mission briefing. 2018 @FishingSkills 1 May in twitter.com (O.E.D. Archive) Gone #fishin', be back at dark-thirty! This entry has been updated (OED Third Edition, December 2021). < n.1960
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