Definition of post-wagon in English:

post-wagon

Pronunciation /ˈpəʊs(t)ˌwaɡ(ə)n/

noun

historical
  • A horse-drawn wagon capable of travelling quickly.

    Used chiefly of stage or mail coaches in other European countries, especially the Netherlands and Germany.

Origin

Late 17th century; earliest use found in William Penn (1644–1718), Quaker leader and founder of Pennsylvania. From post + wagon; in specific use for a mail coach in the Netherlands and Germany, after Dutch postwagen, German Postwagen.