1. (n.) The time of light, or interval between one night and the next; the time between sunrise and sunset, or from dawn to darkness; hence, the light; sunshine.

2. (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.

3. (n.) Those hours, or the daily recurring period, allotted by usage or law for work.

4. (n.) A specified time or period; time, considered with reference to the existence or prominence of a person or thing; age; time.

5. (n.) (Preceded by the) Some day in particular, as some day of contest, some anniversary, etc.

International Date Line Platonic year abundant year academic year aeon age annum annus magnus antedate bissextile year broad day calendar month calendar year century common year cycle cycle of indiction date date line datemark dawn day glow daylight dayshine daytide daytime decade decennary decennium defective year dusk epoch era fateful moment fiscal year fortnight full sun generation great year green flash heyday hour indiction instant interval juncture kairos leap year lifetime light light of day lunar month lunar year lunation luster lustrum man-hour microsecond midday sun millennium millisecond minute moment moment of truth month moon noonlight noontide light period point point of time postdate pregnant moment prime psychological moment quarter quinquennium ray of sunshine regular year season second semester session shine sidereal year solar year space span spell stage stretch sun sun spark sunbeam sunbreak sunburst sunlight sunshine term time time lag trimester twelvemonth twilight week weekday while year