day

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noun \ˈdā\

Definition of day

  1. 1a :  the time of light between one night and the next <the shortest day of the year>b :  daylight 1 <woke up at the break of day>c :  daytime <sleeps during the day and works at night>

  2. 2 astronomy :  the period of rotation of a planet (as earth) or a moon on its axis <the length of one day on Mars>

  3. 3 :  the mean solar day of 24 hours beginning at midnight by mean time <open seven days a week> <the first day of every month> <Take one pill two times a day.>

  4. 4 :  a specified day or date <their wedding day> <the day of her birth>

  5. 5 :  a specified time or period :  age <in grandfather's day> —often used in plural <the old days> <the days of sailing ships>

  6. 6 :  the conflict or contention of the day <played hard and won the day>

  7. 7 :  the time established by usage or law for work, school, or business <starts his day with a cup of coffee> <after a long day at school> <We have a busy day tomorrow.>

day after day

  1. :  for an indefinite or seemingly endless number of days <wore the same pants day after day>

day in, day out

  1. :  for an indefinite number of successive days <does the same thing at work day in, day out>

Examples of day in a sentence

  1. We're open seven days a week, 365 days a year.

  2. Payment is due on the first day of every month.

  3. What day of the week is the 28th? It's a Friday.

  4. He spent five days in the hospital.

  5. She left on Thursday and came back four days later.

  6. That was the happiest day of my life.

  7. Parenthood gets better every day.

  8. The office is closed for the day.

  9. She works eight hours a day.

  10. It costs 10 dollars a day to park there.

Origin and Etymology of day

Middle English, from Old English dæg; akin to Old High German tag day


First Known Use: before 12th century


Day

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biographical name \ˈdā\

Definition of Day

  1. Clarence Shepard, Jr. 1874–1935 American author


Day

biographical name

Definition of Day

  1. Thomas 1748–1789 English author


Day

biographical name

Definition of Day

  1. William Rufus 1849–1923 American statesman and jurist



DAY Defined for English Language Learners

day

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noun \ˈdā\

Definition of day for English Language Learners

  • : a period of 24 hours beginning at midnight : one of the seven time periods that make up a week

  • : the time of light between one night and the next : the part of the day when light from the sun can be seen

  • : the part of the day when people are usually most active and when most businesses are open


DAY Defined for Kids

day

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noun \ˈdā\

Definition of day for Students

  1. 1 :  the time between sunrise and sunset :  daylight

  2. 2 :  the time a planet or moon takes to make one turn on its axis <A day on earth lasts 24 hours.>

  3. 3 :  a period of 24 hours beginning at midnight <The offer expires in ten days.>

  4. 4 :  a specified day or date <Tuesday is Election Day.>

  5. 5 :  a particular time :  age <There was no Internet in your grandparent's day.>

  6. 6 :  the time set apart by custom or law for work <He works an eight-hour day.>



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