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[sahyd-lahyt] /ˈsaɪdˌlaɪt/
an item of incidental information.
either of two lights carried by a vessel under way at night, a red one on the port side and a green on the starboard.
light coming from the side.
a window or other aperture for light in the side of a building, ship, etc.
a window at the side of a door or another window.
Origin of sidelight
First recorded in 1600-10; side1 + light1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for sidelight
Contemporary Examples
Historical Examples
  • They may throw a sidelight on the great drama of frontier war.

    The Story of the Malakand Field Force Sir Winston S. Churchill
  • Our first sidelight on this question came in rather a surprising manner.

    Preventable Diseases Woods Hutchinson
  • But that is neither here nor there; it is merely a sidelight I am giving you.

    The Copper-Clad World Harl Vincent
  • It is a sidelight of life in another 375 part of the world that has to be seen to be understood.

  • He glanced through the sidelight of the front door, carelessly.

    The Moonlit Way

    Robert W. Chambers
  • It was a sidelight upon the character of the awful being with whom we had to deal.

  • "I see," said Bob, vastly amused at this sidelight on the family reputation.

    The Rules of the Game Stewart Edward White
  • This sidelight on the Earl is as much illumination as the story wants, for the moment.

    When Ghost Meets Ghost

    William Frend De Morgan
British Dictionary definitions for sidelight


light coming from the side
a side window
either of the two navigational running lights used by vessels at night, a red light on the port and a green on the starboard
(Brit) either of two small lights on the front of a motor vehicle, used to indicate the presence of the vehicle at night rather than to assist the driver
additional or incidental information
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
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Word Origin and History for sidelight

also side-light, c.1600, "light coming from the side," from side (adj.) + light (n.). Figurative meaning "incidental information on a subject" is attested from 1862.

Online Etymology Dictionary, © 2010 Douglas Harper
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