day

n. period between sunrise and sunset; period of 24 hours

adj. pertaining to the period between sunrise and sunset

A day (symbol: d) is a unit of time equivalent to 24 hours. It is not an SI unit but it is accepted for use with SI. The SI unit of time is the second. The term comes from the Old English dæg.
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James M. Cox Dayton International Airport , also referred to as simply Dayton International Airport, is a public airport located nine miles (14 km) north of the city of Dayton in Montgomery County, Ohio, USA.It was founded in 1936 when the city purchased the original private airstrips from a corporation. The airport is named after James M. Cox, a former governor of Ohio, Democratic presidential nominee, and publisher of the Dayton Daily News.Dayton International Airport handled 1,306,237 passengers in 2006.
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Noun
1. United States writer best known for his autobiographical works (1874-1935)
(synonym) Clarence Day, Clarence Shepard Day Jr.
(hypernym) writer, author

Noun
1. 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"
(synonym) twenty-four hours, solar day, mean solar day
(hypernym) time unit, unit of time
(hyponym) tomorrow
(part-meronym) daytime, daylight
2. some point or period in time; "it should arrive any day now"; "after that day she never trusted him again"; "those were the days"; "these days it is not unusual"
(hypernym) time
(hyponym) Judgment Day, Judgement Day, Day of Judgment, Day of Judgement, Doomsday, Last Judgment, Last Judgement, Last Day, day of reckoning, doomsday, crack of doom, end of the world
3. the time after sunrise and before sunset while it is light outside; "the dawn turned night into day"; "it is easier to make the repairs in the daytime"
(synonym) daytime, daylight
(antonym) night, nighttime, dark
(hypernym) time period, period of time, period
(hyponym) afternoon
(part-holonym) twenty-four hours, solar day, mean solar day
(part-meronym) morning, morn, morning time, forenoon
4. a day assigned to a particular purpose or observance; "Mother's Day"
(hypernym) calendar day, civil day
(hyponym) Admission Day
5. the recurring hours when you are not sleeping (especially those when you are working); "my day began early this morning"; "it was a busy day on the stock exchange"; "she called it a day and went to bed"
(hypernym) work time
(hyponym) workday, working day
6. an era of existence or influence; "in the day of the dinosaurs"; "in the days of the Roman Empire"; "in the days of sailing ships"; "he was a successful pianist in his day"
(hypernym) era, epoch
7. a period of opportunity; "he deserves his day in court"; "every dog has his day"
(hypernym) opportunity, chance
8. the period of time taken by a particular planet (e.g. Mars) to make a complete rotation on its axis; "how long is a day on Jupiter?"
(hypernym) time period, period of time, period
(hyponym) lunar day
9. the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
(synonym) sidereal day
(hypernym) time unit, unit of time

day in day out, every day, daily, day after day

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

(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.
  

(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.
  

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

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