plural days
1
a
: 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 days
the 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.
see also day after day, day in and day out
Examples of day in a Sentence
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.
Recent Examples on the Web
If the powerful winter storm knocks out your electricity, the American Red Cross advises people to be ready with emergency preparedness kits that include coolers, ice, water, flashlights and batteries, a first aid kit, a seven-day supply of medications and more.
—
Jeanine Santucci, USA Today, 25 Jan. 2026
Flight Aware reports that Hartsfield-Jackson Atlanta International Airport has canceled more than 500 flights in the past day and has had over 500 flights expected to land at the airport canceled as well.
—Dan Raby, CBS News, 25 Jan. 2026
Under the new parking policy, non-city residents like Holley are required to pay a higher rate — as much as $16 for a full day of parking — compared to city residents, for which fees can be as high as $8 for all-day parking.
—Maura Fox, San Diego Union-Tribune, 25 Jan. 2026
Nearly all parts of the antenna break down in the stomach within days.
—Kurt Knutsson, FOXNews.com, 25 Jan. 2026
See All Example Sentences for day
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jeanine Santucci, USA Today, 25 Jan. 2026
Flight Aware reports that Hartsfield-Jackson Atlanta International Airport has canceled more than 500 flights in the past day and has had over 500 flights expected to land at the airport canceled as well.
—Dan Raby, CBS News, 25 Jan. 2026
Under the new parking policy, non-city residents like Holley are required to pay a higher rate — as much as $16 for a full day of parking — compared to city residents, for which fees can be as high as $8 for all-day parking.
—Maura Fox, San Diego Union-Tribune, 25 Jan. 2026
Nearly all parts of the antenna break down in the stomach within days.
—Kurt Knutsson, FOXNews.com, 25 Jan. 2026
See All Example Sentences for day
Cite this Entry
“Day.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/day. Accessed 28 Jan. 2026.
Copy CitationKids Definition
day
noun1
a
: the time of light between one night and the next
b
: daylight
2
a
: the time the earth takes to make one turn on its axis
b
: the time required for a heavenly body to turn once on its axis
a lunar day
3
: a period of 24 hours beginning at midnight
4
: a specified day or date
the day of the picnic
their wedding day
5
: a specified time or period : age
in grandmother's day
6
: the conflict or dispute of the day
fought hard and won the day
7
: the time set apart by custom or law for work
the eight-hour day
Biographical Definition
Day
2 of 3biographical name (2)
Thomas 1748–1789 English author
Day
3 of 3biographical name (3)
William Rufus 1849–1923 American statesman and jurist
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