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

Reflect Orbital wants to deliver sunlight to Earth after dark to increase the yield of solar plants and agricultural farms, provide free, sustainable lighting to construction sites and illuminate disaster zones in search of missing persons. — Tereza Pultarova, Space.com, 20 July 2026

The integrated system will monitor and manage energy use, optimize clean power from the solar array, and control the home’s key systems. — Jennifer Castenson, Forbes.com, 20 July 2026

It is also set to become a key power source for China’s national clean energy demonstration base, which brings together hydropower, wind, and solar energy in southeastern Xizang. — Sujita Sinha, Interesting Engineering, 20 July 2026

This bill prohibits local jurisdictions from establishing requirements for commercial solar energy facilities that are more restrictive than the state law. — Chicago Tribune, 20 July 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