noun
historicalA 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.
Are You Learning English? Here Are Our Top English Tips