travelling post office

English

Noun

travelling post office (plural travelling post offices)

1. (rail transport, UK) A type of railway coach designed for the carriage and sorting of mail en route.
   • 1945 November and December, “Return of the T.P.O.”, in Railway Magazine, pages 311–312:

     One of the important railway facilities which disappeared on the outbreak of war was the travelling post office. […] T.P.Os. have now been resumed, with the reinstatement on October 1 of those between Euston and Aberdeen, and between Paddington and Penzanze.

Synonyms

• TPO (abbreviation)
• mail car (US)