The synodic rotation period of the earth with respect to the sun; that is, the length of time from one local noon, when the sun is on the meridian, to the next local noon. A to F | G to L | M to R | S to Z

average time required for the Earth to complete on rotation with respect to the Sun

The time required for the Sun to move from one meridian transit to the next, as a result of the Earth's rotation. Longer than the sidereal day, because of the apparent motion of the Sun, caused by our orbital motion. The apparent solar day is the actual time required for this motion on any given day, and varies throughout the year, because of the tilt of our axis and the eccentricity of our orbit. The mean solar day is the average length of the apparent solar day, over the course of one year.

time between successive meridian crossings of the Sun. Our clocks are based on this interval of time (on Earth, one solar day = 24 hours on average).

time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day"

The time it takes Earth to spin once relative to the Sun, or exactly 24 hours (by definition).

the time for a planet or moon to rotate so that the Sun is again overhead.

A solar day is the amount of time that passes between two subsequent times when the Sun reaches its highest position above the horizon (passing through the meridian). The solar day varies greatly throughout the year, so the mean solar day is used instead. This is calculated as the average of all of the solar days in one year. A solar day is exactly 24 hours (since this is how we define hour, as 1/24 of a day); a solar day is slightly longer than a sidereal day. A solar day is not the time it takes for the Earth to rotate on its axis (that is the sidereal day).

Refers to a period of exactly 24 hours or 1440 minutes.

The Solar Day contains exactly 24 hours (1440 minutes). During the Solar Day, the Earth rotates slightly more than 360 degrees. See also: Sidereal Day.

The time interval from midnight to midnight, with midnight being the sun's transit across the lower meridian.

The complete rotation of the earth in relation to the sun. Although it varies, an average has determined a mean solar day of 24 hours. It is universally used for civil purposes.