zero hourn.

Brit.

/ˈzɪərəʊ ˌaʊə/, U.S.

/ˈzɪroʊ ˌaʊ(ə)r/,

/ˈziroʊ ˌaʊ(ə)r/

Origin: Formed within English, by compounding. Etymons: zero n., hour n.

Etymology: < zero n. + hour n.With sense 3, compare French l'heure zéro (1848 or earlier denoting the hour from which a period of time is measured), zéro heure (1857 or earlier denoting midnight).

1. The time at which a military operation is scheduled to begin. Also in extended use: the time at which any (typically significant) event is scheduled to take place.

ΘΚΠ

society > armed hostility > military operations > [noun] > start of

hour of zero1915

zero hour1915

jump-off1918

the world > time > particular time > [noun] > an appointed or fixed time, day, or date > for something to begin or be released

release date1904

effective date1909

zero hour1915

zero day1917

start date1920

countdown1953

T1959

1915 N.Y. Times 9 Nov. 2/3 At 5:05 A. M. Sept. 25 a message came to the dugout that the ‘zero’ hour, that is, the time the gas was to be started, would be at 5:50 A. M.

1917 W. Beach Thomas With British on Somme ii. v The coming of the zero hour of 3.30 in the morning.

1927 New Yorker 22 Oct. 48/2 (caption) Zero hour—the six o'clock shift waits to go on.

1939 P. G. Wodehouse Uncle Fred in Springtime xviii. 269 Your duties will not begin till after dinner. Zero hour is at nine-thirty sharp.

1953 A. Huxley Let. 2 Feb. (1969) 664 Incidentally, zero hour for tax-payments is approaching.

2007 Washington Post (Nexis) 28 Apr. a12 Almost all the elements for terror attacks were complete except for setting the zero hour for the attacks.

2. The time at which a person feels at his or her lowest. Cf. zero n. 2.Apparently an isolated use.

ΘΠ

the world > time > particular time > [noun] > the time or time of day > when something is at its lowest ebb

zero hour1930

the mind > emotion > suffering > dejection > [noun] > time when things at lowest ebb

zero hour1930

1930 Daily Express 23 May 1/6 Psychologists have fixed 11 a.m. as the zero hour of the worker.

3. The hour from which a new cycle of time is measured; spec. midnight, as the beginning of the day.

ΘΠ

the world > time > particular time > [noun] > the time or time of day > hour from which the time of day is measured

zero hour1939

the world > time > day and night > night > [noun] > midnight

midnighteOE

middle nighteOE

noontide1568

noon1605

witching hour1762

long hour1807

midnight1813

midnight-tide1918

zero hour1939

1939 J. Joyce Finnegans Wake 403 Methought..I heard at zero hour as 'twere the peal of vixen's laughter among midnight's chimes.

1942 D. Polowe Navigation for Mariners & Aviators xii. 152 The interval between zero hour and noon..called A. M. (ante-meridian).

1959 ELH 26 416 Dickinson habitually passed over the conventional middle of the night as the zero hour, when villages are asleep and unaware of time, preferring midday as the hour when eternity begins.

2007 C. Beckford-Brady Sweet Home, Jamaica II. ii. 45 The ten second count-down began and got louder and louder as it approached zero hour. On the stroke of midnight loud cheers erupted.

This entry has been updated (OED Third Edition, June 2014; most recently modified version published online March 2022).

单词	zero hour
释义	zero hourn. Brit. /ˈzɪərəʊ ˌaʊə/, U.S. /ˈzɪroʊ ˌaʊ(ə)r/, /ˈziroʊ ˌaʊ(ə)r/ Origin: Formed within English, by compounding. Etymons: zero n., hour n. Etymology: < zero n. + hour n.With sense 3, compare French l'heure zéro (1848 or earlier denoting the hour from which a period of time is measured), zéro heure (1857 or earlier denoting midnight). 1. The time at which a military operation is scheduled to begin. Also in extended use: the time at which any (typically significant) event is scheduled to take place. ΘΚΠ society > armed hostility > military operations > [noun] > start of hour of zero1915 zero hour1915 jump-off1918 the world > time > particular time > [noun] > an appointed or fixed time, day, or date > for something to begin or be released release date1904 effective date1909 zero hour1915 zero day1917 start date1920 countdown1953 T1959 1915 N.Y. Times 9 Nov. 2/3 At 5:05 A. M. Sept. 25 a message came to the dugout that the ‘zero’ hour, that is, the time the gas was to be started, would be at 5:50 A. M. 1917 W. Beach Thomas With British on Somme ii. v The coming of the zero hour of 3.30 in the morning. 1927 New Yorker 22 Oct. 48/2 (caption) Zero hour—the six o'clock shift waits to go on. 1939 P. G. Wodehouse Uncle Fred in Springtime xviii. 269 Your duties will not begin till after dinner. Zero hour is at nine-thirty sharp. 1953 A. Huxley Let. 2 Feb. (1969) 664 Incidentally, zero hour for tax-payments is approaching. 2007 Washington Post (Nexis) 28 Apr. a12 Almost all the elements for terror attacks were complete except for setting the zero hour for the attacks. 2. The time at which a person feels at his or her lowest. Cf. zero n. 2.Apparently an isolated use. ΘΠ the world > time > particular time > [noun] > the time or time of day > when something is at its lowest ebb zero hour1930 the mind > emotion > suffering > dejection > [noun] > time when things at lowest ebb zero hour1930 1930 Daily Express 23 May 1/6 Psychologists have fixed 11 a.m. as the zero hour of the worker. 3. The hour from which a new cycle of time is measured; spec. midnight, as the beginning of the day. ΘΠ the world > time > particular time > [noun] > the time or time of day > hour from which the time of day is measured zero hour1939 the world > time > day and night > night > [noun] > midnight midnighteOE middle nighteOE noontide1568 noon1605 witching hour1762 long hour1807 midnight1813 midnight-tide1918 zero hour1939 1939 J. Joyce Finnegans Wake 403 Methought..I heard at zero hour as 'twere the peal of vixen's laughter among midnight's chimes. 1942 D. Polowe Navigation for Mariners & Aviators xii. 152 The interval between zero hour and noon..called A. M. (ante-meridian). 1959 ELH 26 416 Dickinson habitually passed over the conventional middle of the night as the zero hour, when villages are asleep and unaware of time, preferring midday as the hour when eternity begins. 2007 C. Beckford-Brady Sweet Home, Jamaica II. ii. 45 The ten second count-down began and got louder and louder as it approached zero hour. On the stroke of midnight loud cheers erupted. This entry has been updated (OED Third Edition, June 2014; most recently modified version published online March 2022). < n.1915
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