Word.ws English Dictionary

colour light signal

colour light signal noun: 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.

colour light signal: an electric railway signal with colour aspects, showing either red or green in a 2-aspect signal,...
Image: Ivor the driver, CC BY-SA 4.0, via Wikimedia Commons

Noun

colour light signal (plural colour light signals)

  1. (UK) 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.
    • Colour-light signals, for both day and night work, came into use at a much later date, and their first use on any scale in this country was on the London underground railways, where the principle adopted was largely American in origin. But although light signalling is credited to America, one of...1955 April, R. H. Warring, “Some Early Railway Signals”, in Railway Magazine, pages 231-232
    Synonyms:
    colour light

Synonyms of colour light signal

Forms of colour light signal

pluralcolour light signals
alternative formcolour-light signal
alternative formcolor light signal
alternative formcolor-light signal

Questions about colour light signal

What does colour light signal mean?
Colour light signal means 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.
What part of speech is colour light signal?
Colour light signal is a noun.
What is the plural of colour light signal?
The plural of colour light signal is colour light signals.

Words near colour light signal in the dictionary

  1. colour in
  2. colour inside the lines
  3. colour killer
  4. colour killers
  5. colour light
  6. colour light signal
  7. colour light signals
  8. colour lights
  9. colour man
  10. colour men
  11. colour of someone's money

Source and license

Adapted from Wiktionary: colour light signal (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “colour light signal.” Word.ws, https://word.ws/colour_light_signal. Based on Wiktionary, CC BY-SA 4.0.