colour light

A form of colour light signal — An electric railway signal with colour aspects, showing either red or green in a 2-aspect signal, with the addition of a yellow or double yellow aspect (meaning caution) in 3- and 4-aspect signals.

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Meanings

nouncolour light (plural colour lights)

plural colour lights

  1. UKabbreviationrail transportShort for colour light signal.
    1 more example

    Progress cannot be denied and must not be deprecated. Colour-lights are obviously the signals of the future. […] The traditional British signal is on its way out. Unsentimental officials will doubtless decree colour-lights from Kings Cross to Waverley, and from Paddington to Penzance, with upper quadrants on minor branches.

    1957 June 29, S. C. Crowther-Smith, “Lower Quadrant”, in Railway Magazine, pages 422, 423

Synonyms & antonyms

Also see
colour light signal
Cite this entry
APA

colour light. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/colour%20light

MLA

“colour light.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/colour%20light. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “colour light,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/colour%20light.

Source: colour light on Wiktionary, CC BY-SA 4.0.