noun
Meaning 1
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.
Definition source: English Wiktionary via Wiktextract
Usage: UK
Topics: rail-transport, railways, transport
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: colour light
Antonyms: none provided