sun

¹

[ suhn ]

noun

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.

Sun.

²

or Sund

abbreviation for

1. Sunday.

Sun.

¹

abbreviation for

1. Sunday

sun

²

/ sʌn /

noun

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
    to become slightly sunburnt
11. place in the sun
    a prominent or favourable position
12. shoot the sun or take the sun
    nautical to measure the altitude of the sun in order to determine latitude
13. touch of the sun
    slight sunstroke
14. under the sun or beneath the sun
    on earth; at all

    nobody under the sun eats more than you do

verb

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

sun

/ 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

sun

1. The star around which the Earth revolves.

Notes

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 .

Derived Forms

• ˈsunˌlike, adjective

Other Words From

• sun·like adjective

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

Word History and Origins

Origin of sun¹

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

Idioms and Phrases

Idioms

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 .

Example Sentences

Wild inhabitants include vulnerable bighorn sheep and desert tortoises, as well as the stocky Chuckwalla lizard that enjoys basking in the sun.

From Los Angeles Times

As the sun sets on the audition process, Miss Jickells, who was first through the door, breathes a sigh of relief.

From BBC

Plants are green because such wavelengths of light help it keep a consistent vacuum on the electromagnetic energy it slurps from the sun.

From Salon

And the lights need to shine brightly enough to counteract the effect of the sun shining from above.

From Los Angeles Times

Tides are caused by the gravitational pull of the moon and sun and are generally very predictable.

From Los Angeles Times

Related Words

• star
• sunlight