Definition of post-house in US English:

post-house

noun

  • A posting-house or inn where horses are kept for the use of travellers; (hence in extended use) an inn or other establishment providing accommodation for travellers. Now archaic or historical.

Origin

Early 17th century; earliest use found in Thomas Coryate (?1577–1617), traveller and writer. From post + house.

Pronunciation

post-house

/ˈpəʊsthaʊs/