colour light signal
English
A 4-aspect colour light signal
Noun
colour light signal (plural colour light signals)
- (rail transport, British spelling) 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.
Alternative forms
- colour-light signal, color light signal, color-light signal
Translations
railway signal
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References
- “colour light signal” in Lexico, Dictionary.com; Oxford University Press.