day - definition, thesaurus and related words from WordNet-Online

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Noun day has 10 senses

day, twenty-four hours, solar day, mean solar day - 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"
--₁ is a kind of time unit, unit of time
--₁ has parts:
day, daytime, daylight; noon, twelve noon, high noon, midday, noonday, noontide; night, nighttime, dark; hour, hr, 60 minutes
--₁ has particulars:
tomorrow; today; yesterday; morrow; eve; date, day of the month; date
day - 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"
--₂ is a kind of time
--₂ has particulars:
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; off-day
day, daytime, daylight - 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"
--₃ is a kind of time period, period of time, period
--₃ is a part of day, twenty-four hours, solar day, mean solar day
--₃ has parts: morning, morn, morning time, forenoon
Antonyms: night, nighttime, dark
--₃ has particulars: afternoon; midafternoon; evening, eve, eventide

day - a day assigned to a particular purpose or observance; "Mother's Day"
--₄ is a kind of calendar day, civil day
--₄ has particulars:

Admission Day; Arbor Day; commencement day, degree day; November 5; Inauguration Day, January 20; leap day, bissextile day, February 29; V-day, Victory Day; rag day; red-letter day; payday; polling day, election day; field day; field day; ides; market day; Walpurgis Night; New Year's Eve, December 31; Robert E Lee's Birthday, Robert E Lee Day, Lee's Birthday, January 19; Tet; holiday; Groundhog Day, February 2; Lincoln's Birthday, February 12; Valentine Day, Valentine's Day, Saint Valentine's Day, St Valentine's Day, February 14; Washington's Birthday, February 22; Texas Independence Day, March 2; St Patrick's Day, Saint Patrick's Day, March 17; April Fools', April Fools' day, All Fools' day; Pan American Day, April 14; Patriot's Day; May Day, First of May, May 1; Mother's Day; Armed Forces Day; Jefferson Davis' Birthday, Davis' Birthday, June 3; Flag Day, June 14; Father's Day; Citizenship Day, September 17; American Indian Day; United Nations Day, October 24; Halloween, Hallowe'en, Allhallows Eve; saint's day; Midsummer Eve, Midsummer Night, St John's Eve, St John's Night, June 23; school day; speech day; washday, washing day; wedding day; anniversary, day of remembrance

day - 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"
--₅ is a kind of work time
--₅ has particulars: workday, working day
day - 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"
--₆ is a kind of era, epoch
day - a period of opportunity; "he deserves his day in court"; "every dog has his day"
--₇ is a kind of opportunity, chance
day - 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?"
--₈ is a kind of time period, period of time, period
--₈ has particulars: lunar day
sidereal day, day - the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
--₉ is a kind of time unit, unit of time; sidereal time
Day, Clarence Day, Clarence Shepard Day Jr. - United States writer best known for his autobiographical works (1874-1935)
--₁₀ is a kind of writer, author