solar day

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noun

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.

Law. the period of time from sunrise to sunset.

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Origin of solar day

First recorded in 1755–65

Words nearby solar day

solar cells, solar chariot, solar collector, solar constant, solar cycle, solar day, solar eclipse, solar-electric propulsion, solar energy, solar flare, solar furnace

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use solar day in a sentence

Yet the general solar day, from which the average one is derived, is a very indefinite term as to its length.
Appletons' Popular Science Monthly, February 1900|Various
Then it must follow that as the daily sections of the orbit vary in length, the time of the solar day must vary in length.
Appletons' Popular Science Monthly, February 1900|Various
All the magnetic elements at any ordinary station show a regular variation in the solar day.
Encyclopaedia Britannica, 11th Edition, Volume 17, Slice 3|Various
The latter are divided into sidereal hours, minutes and seconds as the solar day is.
Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7|Various

But it moved always as the sun moved, and just as regularly, giving a true measure of the solar day.
Time Telling through the Ages|Harry Chase Brearley

British Dictionary definitions for solar day

solar day

noun

the period of time during which the earth makes one complete revolution on its axis relative to the sunSee day (def. 6)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for solar day

solar day

See under solar time.