View synonyms for sun



[ suhn ]


  1. (often initial capital letter) the star that is the central body of the earth's solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93 million miles (150 million km), its diameter about 864,000 miles (1.4 million km), and its mass about 330,000 times that of the earth; its period of surface rotation is about 25 days at its equator but longer at higher latitudes.
  2. the sun considered with reference to its position in the sky, its visibility, the season of the year, the time at which or the place where it is seen, etc.
  3. a star, especially one that has planets and other celestial bodies revolving around it:

    Many other solar systems have multiple suns, while ours has just one.

  4. sunshine; the heat and light from the sun:

    to be exposed to the sun.

  5. a figure or representation of the sun, as a heraldic bearing usually surrounded with rays and marked with the features of a human face.
  6. something likened to the sun in brightness, splendor, etc.
  7. Chiefly Literary.
    1. clime; climate.
    2. glory; splendor.
  8. sunrise or sunset:

    They traveled hard from sun to sun.

  9. Archaic.
    1. a day.
    2. a year.

verb (used with object)

, sunned, sun·ning.
  1. to expose to the sun's rays.
  2. to warm, dry, etc., in the sunshine.
  3. to put, bring, make, etc., by exposure to the sun.

verb (used without object)

, sunned, sun·ning.
  1. to be exposed to the rays of the sun:

    to sun in the yard.


or Sund

abbreviation for

  1. Sunday.



abbreviation for

  1. Sunday



/ sʌn /


  1. the star at the centre of our solar system. It is a gaseous body having a highly compressed core, in which energy is generated by thermonuclear reactions (at about 15 million kelvins), surrounded by less dense radiative and convective zones serving to transport the energy to the surface (the photosphere ). The atmospheric layers (the chromosphere and corona ) are normally invisible except during a total eclipse. Mass and diameter: 333 000 and 109 times that of earth respectively; mean distance from earth: 149.6 million km (1 astronomical unit) solar
  2. any star around which a planetary system revolves
  3. the sun as it appears at a particular time or place

    the winter sun

  4. the radiant energy, esp heat and light, received from the sun; sunshine
  5. a person or thing considered as a source of radiant warmth, glory, etc
  6. a pictorial representation of the sun, often depicted with a human face
  7. poetic.
    a year or a day
  8. poetic.
    a climate
  9. archaic.
    sunrise or sunset (esp in the phrase from sun to sun )
  10. catch the sun
    catch the sun to become slightly sunburnt
  11. place in the sun
    place in the sun a prominent or favourable position
  12. shoot the sun
    shoot the suntake the sun nautical to measure the altitude of the sun in order to determine latitude
  13. touch of the sun
    touch of the sun slight sunstroke
  14. under the sun
    under the sunbeneath the sun on earth; at all

    nobody under the sun eats more than you do


  1. to expose (oneself) to the sunshine
  2. tr to expose to the sunshine in order to warm, tan, etc


/ sŭn /

  1. Often Sun. A medium-sized, main-sequence star located in a spiral arm of the Milky Way galaxy, orbited by all of the planets and other bodies in our solar system and supplying the heat and light that sustain life on Earth. Its diameter is approximately 1,392,000 million km (865,000 mi), and its mass, about 330,000 times that of Earth, comprises more than 99 percent of the matter in the solar system. It has a temperature of some 5.7 million degrees C (28.3 million degrees F) at its core, where nuclear fusion produces tremendous amounts of energy, mainly through the series of reactions known as the proton-proton chain . The energy generated in the core radiates through a radiation zone to an opaque convection zone, where it rises to the surface through convection currents of the Sun's plasma. The Sun's surface temperature (at its photosphere ) is approximately 6,200 degrees C (11,200 degrees F). Turbulent surface phenomena analogous to the Earth's weather are prevalent, including magnetic storms, sunspots, and solar flares. The Sun was formed along with the rest of the solar system about 4.5 billion years ago and is expected to run out of its current hydrogen fuel in another 5 billion years, at which point it will develop into a red giant and ultimately into a white dwarf.
  2. See Table at solar systemSee Note at dwarf star


  1. The star around which the Earth revolves.

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The sun is about 4.5 billion years old and is expected to remain in its present state for approximately another six billion years; it will eventually evolve into a white dwarf .

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Derived Forms

  • ˈsunˌlike, adjective

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Other Words From

  • sun·like adjective

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Word History and Origins

Origin of sun1

First recorded before 900; Middle English sonne, sun(e), son(e), Old English sunne; cognate with German Sonne, Old Norse sunna, Gothic sunno; akin to Old Norse sōl, Gothic sauil, Latin sōl, Greek hḗlios, Welsh haul, Lithuanian saũlė, Polish słońce

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Word History and Origins

Origin of sun1

Old English sunne; related to Old High German sunna, Old Frisian senne, Gothic sunno

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Idioms and Phrases

  1. against the sun, Nautical. counterclockwise.
  2. place in the sun, a favorable or advantageous position; prominence; recognition:

    The new generation of writers has achieved a place in the sun.

  3. under the sun, on earth; anywhere:

    the most beautiful city under the sun.

  4. with the sun, Nautical. clockwise.

More idioms and phrases containing sun

In addition to the idiom beginning with sun , also see everything but the kitchen sink (under the sun) ; make hay while the sun shines ; nothing new under the sun ; place in the sun .

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Example Sentences

Vast power of the sun is tapped by battery using sand ingredient.

Any sun shirt is better than no sun shirt, but I like the Crossover because it’s so damn comfortable.

“Maybe when Venus comes around on the other side of the sun again,” Greaves says, “things will be better for us here on Earth.”

As the sun rose, a new series of medical experts began to evaluate her.

At the moment, it’s about the equivalent of standing outside at noon in the sun, about 1 kW per square meter.

There was deep brown flesh, and bronze flesh, and pallid white flesh, and flesh turned red from the hot sun.

They will do it,” Revels declared, “as certainly as the sun shines in the heavens.

The nanas and poppies and grannies and grampses who flocked there to roast in the sun.

He likes when the sun glances off it from the top, because it looks like the black marlin.

She had to break the news to William that The Sun had the story.

Behold a dumpy, comfortable British paterfamilias in a light flannel suit and a faded sun hat.

It was very warm, and for a while they did nothing but exchange remarks about the heat, the sun, the glare.

The sun was shining when they arrived at Salon, the gayest, the most coquettish, the most laughing little town in Provence.

Only the petrol tins they took for water right and left of their pathway up the cliff; huge diamonds in the evening sun.

I am pleading for a clear white light of education that shall go like the sun round the whole world.


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Definitions and idiom definitions from Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.




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