1
: of, derived from, relating to, or caused by the sun
2
: measured by the earth's course in relation to the sun
a solar year
also
: relating to or reckoned by solar time
3
a
: produced or operated by the action of the sun's light or heat
solar energy
b
: utilizing the sun's rays especially to produce heat or electricity
a solar house
also
: of or relating to such utilization
solar design
Examples of solar in a Sentence
Recent Examples on the Web
Why solar and lunar eclipses come in pairs Once an eclipse season begins, a pair of eclipses becomes almost inevitable.
—
Jamie Carter, Space.com, 13 Feb. 2026
Working out the math for the collision of, say, two five-solar-mass black holes, the amount of energy blasted out in less than a second by such a merger would be roughly the same as the sun will emit in seven trillion years.
—Phil Plait, Scientific American, 13 Feb. 2026
Funding and other support for renewables, especially solar and wind, are gone or destined to disappear in the next year.
—John Moritz, Hartford Courant, 13 Feb. 2026
Today, solar energy plus the cost to store it is about half as much as new coal plants, according to Ember.
—Laura Paddison, CNN Money, 11 Feb. 2026
See All Example Sentences for solar
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Jamie Carter, Space.com, 13 Feb. 2026
Working out the math for the collision of, say, two five-solar-mass black holes, the amount of energy blasted out in less than a second by such a merger would be roughly the same as the sun will emit in seven trillion years.
—Phil Plait, Scientific American, 13 Feb. 2026
Funding and other support for renewables, especially solar and wind, are gone or destined to disappear in the next year.
—John Moritz, Hartford Courant, 13 Feb. 2026
Today, solar energy plus the cost to store it is about half as much as new coal plants, according to Ember.
—Laura Paddison, CNN Money, 11 Feb. 2026
See All Example Sentences for solar
Cite this Entry
“Solar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/solar. Accessed 14 Feb. 2026.
Copy CitationKids Definition
solar
adjective
so·lar
ˈsō-lər 
-ˌlär
1
: of, derived from, relating to, or caused by the sun
2
: measured by the earth's course in relation to the sun
solar time
solar year
3
a
: produced or operated by the action of the sun's light or heat
solar energy
b
: using the sun's rays especially to produce heat or electricity
a solar house
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