noun
Meaning 1
A small explosive charge (detonator) which can be placed on a railway line in fog, to be detonated by a train passing over it as a warning signal to the driver.
Definition source: English Wiktionary via Wiktextract
Usage: UK
Topics: rail-transport, railways, transport
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided