\ ˈsən How to pronounce sun (audio) \

Definition of sun

 (Entry 1 of 3)

1a often capitalized : the luminous celestial body around which the earth and other planets revolve, from which they receive heat and light, which is composed mainly of hydrogen and helium, and which has a mean distance from earth of about 93,000,000 miles (150,000,000 kilometers), a linear diameter of 864,000 miles (1,390,000 kilometers), and a mass 332,000 times greater than earth
b : a celestial body like the sun : star
2 : the heat or light radiated from the sun played in the sun all day
3 : one resembling the sun (as in warmth or brilliance)
4 : the rising or setting of the sun from sun to sun
in the sun
: in the public eye
under the sun
: in the world : on earth


sunned; sunning

Definition of sun (Entry 2 of 3)

transitive verb

: to expose to or as if to the rays of the sun

intransitive verb

: to sun oneself

Definition of Sun (Entry 3 of 3)


Synonyms for sun

Synonyms: Noun

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Examples of sun in a Sentence

Noun The rain has stopped and the sun is shining. The sun rises in the east and sets in the west. the warmth of the sun's rays They dream of traveling to distant suns. Try to keep out of the sun. The cat lay basking in the sun. Verb People sunned themselves on the hillside. See More
Recent Examples on the Web: Noun As the bright day goes around the sun, why do our days grow more aggressive and difficult? Henri Cole, The New Yorker, 13 June 2022 The couple looks sun-kissed and relaxed in the casual selfie. Katie Bowlby, Country Living, 12 June 2022 Kendall Jenner spent some time in the sun-soaked outdoors this past week for a major self-care moment. Liana Satenstein, Vogue, 11 June 2022 The reason the planets will all appear at once is because all of the planet's orbits around the sun are near aligned. Jordan Mendoza, USA TODAY, 6 June 2022 But in recent years, biologists have shown that iridescence—lustrous shifts in color, depending on the angle of view—can actually camouflage green jewel beetles among sun-dappled leaves. Kate Golembiewski, Scientific American, 3 June 2022 Normani marked her latest lap around the sun with a luxury beach getaway. Jack Irvin,, 1 June 2022 The reason has to do with the relative positions of Mercury and Earth around the sun. Marina Koren, The Atlantic, 28 May 2022 First discovered in 1989, Asteroid 7335 does laps around the sun every 861 days while overlapping with Earth’s orbit. Manasee Wagh, Popular Mechanics, 23 May 2022 Recent Examples on the Web: Verb On May 24, 2007, a few weeks after his first confirmed sighting in more than a year, Reggie crawled out of the water to sun himself on a bank just inside the chain-link fence. Los Angeles Times, 24 May 2022 This white sand beach is a great place to swim and sun on repeat. Olivia Hosken, Town & Country, 16 May 2022 The National Weather Service says afternoon skies will be a mix of clouds and sun with a high of 65 by late afternoon, cooling a bit from Sunday’s 70 degree high. oregonlive, 16 May 2022 With the blistering Alabama sun beaming down on them, the crowd at the foot of the Edmund Pettus Bridge was growing restless. Washington Post, 11 Apr. 2022 After cleansing, make sure to apply the proper sunscreen since BHAs make your skin more prone to sun damage and irritation. Grooming Playbook, The Salt Lake Tribune, 10 Apr. 2022 Dowell knows where there is an eagles nest across the river, or the call of the sandhill cranes that have been flying overhead the last couple days, or the spots where the turtles like to sun on the banks. Sarah Bowman, The Indianapolis Star, 2 Mar. 2022 On Tuesday there will be a mixture of clouds and sun with high temperatures in the mid 60s. Angela Cordoba Perez, The Arizona Republic, 22 Feb. 2022 Erasing this protective shield would subject animals and plants to sun damage, potentially altering the food web for thousands of years. Jennifer Leman, Popular Mechanics, 31 Dec. 2021 See More

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

First Known Use of sun


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


15th century, in the meaning defined at transitive sense

History and Etymology for sun


Middle English sunne, from Old English; akin to Old High German sunna sun, Latin sol — more at solar

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Time Traveler for sun

Time Traveler

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

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Dictionary Entries Near sun

sum up



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Statistics for sun

Last Updated

15 Jun 2022

Cite this Entry

“Sun.” Dictionary, Merriam-Webster, Accessed 26 Jun. 2022.

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More Definitions for sun


\ ˈsən How to pronounce sun (audio) \

Kids Definition of sun

 (Entry 1 of 3)

1 : the heavenly body in our solar system whose light makes our day and around which the planets revolve
2 : sunshine sense 1 I'm going outside to get some sun.
3 : a heavenly body like our sun


sunned; sunning

Kids Definition of sun (Entry 2 of 3)

: to expose to or lie or sit in the rays of the sun



Kids Definition of Sun.


More from Merriam-Webster on sun

Nglish: Translation of sun for Spanish Speakers

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


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