Dictionary
Dictionary
Day — definition & meaning
Word Type Definition Day n. The period of the earth's revolution on its axis. --
ordinarily divided into twenty-four hours. It is measured by the
interval between two successive transits of a celestial body over the
same meridian, and takes a specific name from that of the body. Thus,
if this is the sun, the day (the interval between two successive
transits of the sun's center over the same meridian) is called a solar
day; if it is a star, a sidereal day; if it is the moon, a lunar day.
See Civil day, Sidereal day, below.
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