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

Topics cover launches, astronaut support, solar studies, and deep space exploration. — Mrigakshi Dixit, Interesting Engineering, 9 Oct. 2026

Previous experiments measuring solar neutrinos were only able to see electron neutrinos, which are the only type produced in fusion reactions in the Sun’s core. — Doug Cowen, The Conversation, 8 Oct. 2026

Both Ogalla and Pretzel voted against two massive solar projects earlier this year, including the Pride of the Prairie project at 6,100 acres and Plum Valley at 2,400 acres. — Michelle Mullins, Chicago Tribune, 8 Oct. 2026

The combination of 4G connectivity, radar detection, AI monitoring and solar power also means the feeder can continue working with less day-to-day attention. — New Atlas, 8 Oct. 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