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See more synonyms for solar on Thesaurus.com
  1. of or relating to the sun: solar phenomena.
  2. determined by the sun: solar hour.
  3. proceeding from the sun, as light or heat.
  4. utilizing, operated by, or depending on solar energy: a solar building; a solar stove.
  5. indicating time by means of or with reference to the sun: a solar chronometer.
  6. manufacturing or providing solar power: the solar industry.
  7. Astrology. subject to the influence of the sun.
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  1. Informal. solar energy.
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Origin of solar1

1400–50; late Middle English < Latin sōlāris, equivalent to sōl sun + -āris -ar1


[sol-er, soh-ler]
  1. a private or upper chamber in a medieval English house.
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Also sollar, soller.

Origin of solar2

before 900; Middle English solar, soler < Anglo-French soler, Old French solier < Latin sōlārium solarium; compare Old English solor, soler, Middle Dutch solre loft < Latin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for solar

Contemporary Examples

Historical Examples

  • For the cross of four equal arms and the solar wheel are also to be met with.

    The Non-Christian Cross

    John Denham Parsons

  • That graveled him; he said that she couldn't any more get out of order than the solar sister.

    Tom Sawyer Abroad

    Mark Twain (Samuel Clemens)

  • Every swarm of meteors in the solar system was carefully plotted.

    Pirates of the Gorm

    Nat Schachner

  • I was smart enough to fool all the so-called brains of the Solar System.

    Irresistible Weapon

    Horace Brown Fyfe

  • Almost, Mr. Smith forgot people and the solar system and what had been.

    Happy Ending

    Fredric Brown

British Dictionary definitions for solar


  1. of or relating to the sunsolar eclipse
  2. operating by or utilizing the energy of the sunsolar cell
  3. astronomy determined from the motion of the earth relative to the sunsolar year
  4. astrology subject to the influence of the sun
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Word Origin

C15: from Latin sōlāris, from sōl the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for solar


mid-15c., "pertaining to the sun," from Latin solaris "of the sun," from sol "sun" (see sol). Meaning "living room on an upper story" is from Old English, from Latin solarium (see solarium).

Astrological sense from 1620s. Meaning "operated by means of the sun" is from 1740; solar power is attested from 1915, solar cell from 1955, solar panel from 1964. Solar system is attested from c.1704; solar wind is from 1958. Solar plexus (1771) "complex of nerves in the pit of the stomach," apparently so called from its central position in the body (cf. plexus).

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Online Etymology Dictionary, © 2010 Douglas Harper

solar in Science


  1. Relating to the Sun.
  2. Using or operated by energy from the Sun.
  3. Measured in reference to the Sun.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.