• (n.) A house for distributing the malls; a post office. • (n.) A house established for the convenience of the post, where relays of horses can be obtained.
Post'house` noun 1. A house established for the convenience of the post, where relays of horses can be obtained. 2. A house for distributing the malls; a post office. 
post house noun an inn for exchanging post horses and accommodating riders