paquebot

/P AH0 K EH1 B AH0 T/
noun
  1. 1

    a mailboat

  2. 2

    (postal history) 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.

adjective
  1. 1

    Relating to mail posted at sea.