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

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

At its intimate factory, Crystal expanded its rooftop solar installation beyond the contract demand to fully utilize the available rooftop space. — Angela Velasquez, Footwear News, 26 June 2026

The movement, with an 80-hour power reserve and a frequency of 4 Hz, is also home to a perpetual calendar and an equation of time display, showing the difference between mean solar time, shown on the main dial, and true solar time, which fluctuates due to the Earth’s elliptical orbit. — Nicole Hoey, Robb Report, 26 June 2026

Surging demand for air conditioning, with temperatures staying high into the evening when solar output falls, combined with the high-pressure system behind the heat wave stilling the air and limiting wind generation, have forced power networks to scramble. — Tom Chivers, semafor.com, 26 June 2026

And now, higher-than-expected drag on the satellite from Earth's outer atmosphere (caused by solar storms) will pull Swift out of orbit by year's end. — Tariq Malik, Space.com, 26 June 2026

Word History

Etymology

Middle English, from Latin solaris, from sol sun; akin to Old English & Old Norse sōl sun, Lithuanian saulė, Greek hēlios

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing solar

• mean solar day
• solar battery
• solar cell
• solar collector
• solar constant
• solar day
• solar eclipse
• solar farm
• solar flare
• solar mass
• solar panel
• solar park
• solar plexus
• solar pond
• solar sail
• solar system
• solar wind

Rhymes for solar

• bowler
• dolor
• molar
• polar
• roller
• soler
• stroller
• troller
• volar
• ambipolar
• areolar
• bronchiolar

Kids 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

Etymology

Middle English solar "derived from or related to the sun," from Latin solaris (same meaning), from sol "sun" — related to sunday see Word History at sunday