from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a mailboat
- n. a postal marking or cancellation stamped on mail posted at sea or in a harbour for processing by the postal authorities at the next port of call. Mail so marked in one country will often carry the stamps of another country.
- adj. Relating to mail posted at sea.
French for mailboat. First used in Great Britain in 1894, the term was adopted for general use by the Universal Postal Union in 1897. (Wiktionary)