post office

noun

1. A place (building, office, shop, or counter) concerned with the business of delivering letters, post or mail and selling stamps, etc.

   “We were over the border here, into Northern Ireland, and the post office had a very English atmosphere. It was pleasant, too, much as we enjoyed the hospitality of the Republic, to be buying stamps with the Queen's head on them, and to be posting our cards in a red pillar-box, instead of a green one.”

2. An organization that delivers letters.

   ““The post-office is a wonderful establishment!” said she.—“The regularity and despatch of it! If one thinks of all that it has to do, and all that it does so well, it is really astonishing!””

3. A party game involving the exchange of kisses.