Hour - meaning and definition. What is Hour
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  3. Hour

What (who) is Hour - definition

UNIT OF TIME
Quarter-hour; Stound; Italian time; 🝮; Italian hour; Italic time; Italic hour; Babylonian hour; Egyptian hours; Egyptian hour; Hours; Hour unit; Babylonian hours; Italian hours
  • Midnight (or [[noon]]) to 1 on a 12-hour clock with an analogue face
  • Sundial with Italian hours in [[Asti]]
  • A Chinese diagram from [[Su Song]]'s AD{{nbsp}}1092 ''Xinyi Xiangfa Yao'' illustrating his clocktower at [[Kaifeng]].
  • [[Midnight]] to 1 a.m. on a 24-hour clock with a digital face
  • deified Hours]] of the Greeks and Romans
  • 12}} the outer radius of the dial. This animation depicts the motion of the shadow from 3 a.m. to 9 p.m. on mid-summer's day, when the Sun is at its highest declination (roughly 23.5°). Sunrise and sunset occur at 3 a.m. and 9 p.m. respectively on that day at geographical latitudes near 57.5°, roughly the latitude of Aberdeen or Sitka, Alaska.
  • Planispheric astrolabe designed for the latitude of Varese (Italy)

hour         
¦ noun
1. a period of time equal to a twenty-fourth part of a day and night and divided into 60 minutes.
2. a time of day specified as an exact number of hours from midnight or midday.
(hours) [with preceding numeral] a time so specified on the 24-hour clock.
3. a period of time for or marked by a specific activity: leisure hours.
a point in time: the shop is half-full even at this hour.
4. (hours) (in the Western (Latin) Church) a short service of psalms and prayers to be said at a particular time of day.
5. Astronomy 15° of longitude or right ascension (one twenty-fourth part of a circle).
Phrases
on the hour
1. at an exact hour, or on each hour, of the day or night.
2. after a period of one hour.
Origin
ME: from Anglo-Norman Fr. ure, via L. from Gk hora 'season, hour'.
hour         
n.
1) to show, tell the hour (my watch shows the minute and hour)
2) a solid ('full') hour (the police grilled him for three solid hours)
3) an ungodly ('very early'); ('very late') hour (she called at an ungodly hour)
4) the decisive hour; or: the hour of decision
5) the cocktail hour
6) office; peak; visiting hours (during peak hours more trains run)
7) the rush hour (traffic is very heavy during the rush hour)
8) at a certain hour (at the appointed hour)
9) by the hour (to pay workers by the hour)
10) in a certain hour (in one's hour of need)
11) in, inside, within an hour (she'll be here in an hour)
12) on the hour ('every hour')
13) (misc.) to keep late hours ('to go to bed late'); one's finest hour ('the noblest period in one's life'); in the wee hours of the morning ('late at night'); after hours ('after work'); (a) happy hour ('period in which a bar sells alcoholic drinks at a reduced price'); H-hour/zero hour ('time at which a significant event is scheduled to begin')
hour         
(hours)
Frequency: The word is one of the 700 most common words in English.
1.
An hour is a period of sixty minutes.
They waited for about two hours...
I only slept about half an hour that night.
...a twenty-four hour strike...
N-COUNT
2.
People say that something takes or lasts hours to emphasize that it takes or lasts a very long time, or what seems like a very long time.
Getting there would take hours.
N-PLURAL [emphasis]
3.
A clock that strikes the hour strikes when it is exactly one o'clock, two o'clock, and so on.
N-SING: the N
4.
You can refer to a particular time or moment as a particular hour. (LITERARY)
...the hour of his execution...
= time
N-SING: with supp
5.
If you refer, for example, to someone's hour of need or hour of happiness, you are referring to the time in their life when they are or were experiencing that condition or feeling. (LITERARY)
...the darkest hour of my professional life.
N-COUNT: with supp
6.
You can refer to the period of time during which something happens or operates each day as the hours during which it happens or operates.
...the hours of darkness...
Phone us on this number during office hours.
N-PLURAL: with supp
7.
If you refer to the hours involved in a job, you are talking about how long you spend each week doing it and when you do it.
I worked quite irregular hours...
N-PLURAL
8.
9.
If you do something after hours, you do it outside normal business hours or the time when you are usually at work.
...a local restaurant where steel workers unwind after hours...
PHRASE: PHR after v, PHR n
see also after-hours
10.
If you say that something happens at all hours of the day or night, you disapprove of it happening at the time that it does or as often as it does.
She didn't want her fourteen-year-old daughter coming home at all hours of the morning.
PHRASE: PHR after v [disapproval]
11.
If something happens in the early hours or in the small hours, it happens in the early morning after midnight.
Gibbs was arrested in the early hours of yesterday morning.
PHRASE
12.
If something happens on the hour, it happens every hour at, for example, nine o'clock, ten o'clock, and so on, and not at any number of minutes past an hour.
PHRASE: PHR after v
13.
Something that happens out of hours happens at a time that is not during the usual hours of business or work. (mainly BRIT)
Teachers refused to run out of hours sports matches because they weren't being paid.
PHRASE: PHR after v, PHR n

Wikipedia

Hour

An hour (symbol: h; also abbreviated hr) is a unit of time historically reckoned as 1⁄24 of a day and defined contemporarily as exactly 3,600 seconds (SI). There are 60 minutes in an hour, and 24 hours in a day.

The hour was initially established in the ancient Near East as a variable measure of 1⁄12 of the night or daytime. Such seasonal hours, also known as temporal hours or unequal hours, varied by season and latitude.

Equal hours or equinoctial hours were taken as 1⁄24 of the day as measured from noon to noon; the minor seasonal variations of this unit were eventually smoothed by making it 1⁄24 of the mean solar day. Since this unit was not constant due to long term variations in the Earth's rotation, the hour was finally separated from the Earth's rotation and defined in terms of the atomic or physical second.

In the modern metric system, hours are an accepted unit of time defined as 3,600 atomic seconds. However, on rare occasions an hour may incorporate a positive or negative leap second, effectively making it appear to last 3,599 or 3,601 seconds, in order to keep UTC within 0.9 seconds of UT1, the latter of which is based on measurements of the mean solar day.

https://en.wikipedia.org/wiki/Hour
Examples of use of Hour
1. Live commentary28.01.2004: Hour by hour: Blair‘s big week
2. "An hour is an hour." Laughter rippled through the gallery.
3. Hour by hour, the situation on the ground is improving.
4. There, for hour after hour, he was forced to fight.
5. The situation would be monitored "hour by hour," he said.
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