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

One project, worth $400 million, would have seen the installation of solar and battery storage systems in low-income homes and those with medical needs. — Dánica Coto, Los Angeles Times, 6 Nov. 2026

While some solar and battery storage is part of that mix, most of the expansion will be powered by gas. — Kristi Swartz, AJC.com, 6 Nov. 2026

Traditional oil and gas majors sank, while solar and green energy stocks surged, driven by expectations that a Democratic Congress will resume pushing subsidies for them. — Michael Khouw, CNBC, 6 Nov. 2026

Earth’s ionosphere is a region of the upper atmosphere, extending from roughly 30 to 600 miles above sea level, where solar radiation ionizes atoms and molecules, according to the National Oceanic and Atmospheric Administration. — Don Sweeney, Sacbee.com, 5 Nov. 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