solar

¹ American  

[soh-ler] / ˈsoʊ lər /

adjective

1. of or relating to the sun.

   solar phenomena.

2. determined by the sun.

   solar hour.

3. proceeding from the sun, as light or heat.

4. utilizing, operated by, or depending on solar energy.

   a solar building;

   a solar stove.

5. indicating time by means of or with reference to the sun.

   a solar chronometer.

6. manufacturing or providing solar power.

   the solar industry.

7. Astrology. subject to the influence of the sun.

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noun

1. Informal. solar energy.

solar ² American  

[sol-er, soh-ler] / ˈsɒl ər, ˈsoʊ lər /

Also soller

noun

1. a private or upper chamber in a medieval English house.

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solar British  

/ ˈsəʊlə /

adjective

1. of or relating to the sun

   solar eclipse

2. operating by or utilizing the energy of the sun

   solar cell

3. astronomy determined from the motion of the earth relative to the sun

   solar year

4. astrology subject to the influence of the sun

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solar Scientific  

/ sō′lər /

1. Relating to the Sun.

2. Using or operated by energy from the Sun.

3. Measured in reference to the Sun.

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Etymology

Origin of solar¹

First recorded in 1400–50; late Middle English, from Latin sōlāris, equivalent to sōl + -āris adjective suffix; sun, -ar ¹

Origin of solar²

First recorded before 900; Middle English solar, soler, from Old English solor, soler, and Anglo-French soler, Old French solier, from Latin sōlārium solarium

Example Sentences

On about the sixth day of the mission, as Orion cruises beyond the Moon, the astronauts will get to see a total solar eclipse.

From BBC • Apr. 2, 2026

"The moon is a witness plate to our entire solar system's formation," said astronaut Koch in a press conference over the weekend.

From Barron's • Apr. 1, 2026

Because of this structure, perovskites are already widely studied for use in optoelectronics and advanced solar cells.

From Science Daily • Mar. 31, 2026

Athena ended up in a frigid crater and tipped over, leaving its solar batteries unable to charge.

From MarketWatch • Mar. 31, 2026

But how could Rome claim to be the seat of the one true Church if its authority could not extend to other solar systems?

From "Zero: The Biography of a Dangerous Idea" by Charles Seife

Related Words

• cosmic