noun
Meaning 1
A system for advising the driver of a public transport vehicle that there is an emergency on board, and that the vehicle should stop as quickly as possible. It may be a cord, chain, bell push, or other activating device.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided