post office
- A public department or corporation responsible for mail services, including the collection, sorting, and delivery of letters and parcels. nounI need to go to the post office to send this package.The post office was closed on the public holiday.
- A building or room where mail is received, sorted, and sent out, and where postal services are provided to the public. nounThere's a post office at the corner of Main Street and Elm Avenue.She works at the local post office as a clerk.