solar day
Americannoun
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Astronomy. the time interval between two successive transits by the sun of the meridian directly opposite that of the observer; the 24-hour interval from one midnight to the following midnight.
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Law. the period of time from sunrise to sunset.
noun
Etymology
Origin of solar day
First recorded in 1755–65
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Yes, year-round standard time ensures that the solar day is centered on 12 p.m.
From Washington Post ● Nov. 8, 2022
Yet in 2020 there were 28 separate occasions in which a solar day occurred from anywhere between 1.0516 milliseconds and 1.4602 milliseconds less than that period.
From Salon ● Jan. 8, 2021
Most people’s natural cycle is somewhat longer than the 24-hour solar day, which means that, left to our own devices, we would quickly get out of sync with the external world.
From New York Times ● Mar. 10, 2017
After the invention of mechanical clocks that run at a uniform rate, it became necessary to abandon the apparent solar day as the fundamental unit of time.
From Textbooks ● Oct. 13, 2016
In latitudes not described as separate we have reports of the solar day apparently contradictory.
From Great Men and Famous Women, Vol. 7 A Series of Pen and Pencil Sketches of the Lives of More Than 200 of the Most Prominent Personages in History by Horne, Charles F. (Charles Francis)
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
