Meaning of field postcard in English:

field postcard

Pronunciation /ˈfiːld ˌpəʊs(t)kɑːd/

noun

historical
  • A postcard designed for use by soldiers in the field; a postcard of a type sent by a soldier in the field.

Origin

Late 19th century; earliest use found in Stamp-collector's Magazine. Originally from field post + card, after German Feldpostkarte; subsequently reinterpreted as from field + postcard.