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Definition of 'day'


  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"
       Synonyms: twenty-four hours twenty-four hour period 24-hour interval solar day mean solar day
  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"
  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"
       Synonyms: daytime daylight
       Antonyms: night nighttime dark
  4. a day assigned to a particular purpose or observance; "Mother's 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"
  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"
  7. a period of opportunity; "he deserves his day in court"; "every dog has his day"
  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?"
  9. the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
       Synonyms: sidereal day
  10. United States writer best known for his autobiographical works (1874-1935)
       Synonyms: Clarence Day Clarence Shepard Day Jr.

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