\ ˈdā How to pronounce day (audio) \

Definition of day

 (Entry 1 of 4)

1a : the time of light between one night and the next the shortest day of the year
b : daylight sense 1 woke up at the break of day
c : daytime sleeps during the day and works at night
2 astronomy : the period of rotation of a planet (such as earth) or a moon on its axis the length of one day on Mars
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 : a specified day or date their wedding day the day of her birth
5 : a specified time or period : age in grandfather's day often used in pluralthe old daysthe days of sailing ships
6 : the conflict or contention of the day played hard and won the day
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
: for an indefinite or seemingly endless number of days wore the same pants day after day
day in, day out
: for an indefinite number of successive days does the same thing at work day in, day out


biographical name (1)
\ ˈdā How to pronounce Day (audio) \

Definition of Day (Entry 2 of 4)

Clarence Shepard, Jr. 1874–1935 American author


biographical name (2)

Definition of Day (Entry 3 of 4)

Thomas 1748–1789 English author


biographical name (3)

Definition of Day (Entry 4 of 4)

William Rufus 1849–1923 American statesman and jurist

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Synonyms & Antonyms for day

Synonyms: Noun

Antonyms: Noun

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Examples of day in a Sentence

Noun We're open seven days a week, 365 days a year. Payment is due on the first day of every month. “What day of the week is the 28th?” “It's a Friday.” He spent five days in the hospital. She left on Thursday and came back four days later. That was the happiest day of my life. Parenthood gets better every day. The office is closed for the day. She works eight hours a day. It costs 10 dollars a day to park there.
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Recent Examples on the Web: Noun The research, published in the Journal of Paleontology, notes Dilophosaurus was significantly larger than it was portrayed in the movie, reaching up to 20 feet in length and had more in common with modern-day birds than previously believed. Fox News, "'Jurassic Park' got nearly everything wrong about Dilophosaurus, new study says," 9 July 2020 Having games mostly every other day might lead to the Suns being fresher, especially against teams with older players in their rotation. Duane Rankin, The Arizona Republic, "How pace, turnovers and youth can make or break Phoenix Suns in NBA restart," 8 July 2020 As the Morning Mayor used to say: Every new day should be unwrapped like a precious gift. Ed Silverman, STAT, "Pharmalittle: U.S. scientists and Moderna squabble over Covid-19 vaccine; BARDA doles out big coronavirus contracts," 7 July 2020 Friday, July 10, northbound traffic on I-71/75 will be reduced to one lane between 10 p.m. and 5 a.m. every day. Jeanne Houck, The Enquirer, "Heads up! More traffic delays in Northern Kentucky," 6 July 2020 His chicken is marinated and fried fresh every day, and the white meat chicken tender is juicy. Anna Caplan, Dallas News, "Where to celebrate National Fried Chicken Day in Southlake," 2 July 2020 According to research psychologist Kelly McGonigal, PhD, author of The Joy of Movement, incorporating a little nature every day is beneficial to managing your stress levels. Taylyn Washington-harmon,, "How to Relieve Stress, According to Experts," 1 July 2020 More than 1,000 Americans have died on average every day since the first death was recorded in February. Ivana Kottasová, CNN, "What you need to know about coronavirus on Wednesday, July 1," 1 July 2020 One week, the red group will arrive at the shop at 6 a.m. every day and work until noon. Jim Ayello, The Indianapolis Star, "What happens if an IndyCar driver contracts COVID-19?," 1 July 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'day.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of day


before the 12th century, in the meaning defined at sense 1a

History and Etymology for day


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

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Time Traveler for day

Time Traveler

The first known use of day was before the 12th century

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Statistics for day

Last Updated

11 Jul 2020

Cite this Entry

“Day.” Dictionary, Merriam-Webster, Accessed 11 Jul. 2020.

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More Definitions for day


How to pronounce Day (audio)

English Language Learners Definition of day

: 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


\ ˈdā How to pronounce day (audio) \

Kids Definition of day

1 : the time between sunrise and sunset : daylight
2 : the time a planet or moon takes to make one turn on its axis A day on earth lasts 24 hours.
3 : a period of 24 hours beginning at midnight The offer expires in ten days.
4 : a specified day or date Tuesday is Election Day.
5 : a particular time : age There was no Internet in your grandparent's day.
6 : the time set apart by custom or law for work He works an eight-hour day.

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More from Merriam-Webster on day

Thesaurus: All synonyms and antonyms for day

Rhyming Dictionary: Words that rhyme with day

Spanish Central: Translation of day

Nglish: Translation of day for Spanish Speakers

Britannica English: Translation of day for Arabic Speakers Encyclopedia article about day

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