Origin: Latin prefix post-
Post office has 4 different meanings across 1 category:
a local branch where postal services are available
an independent agency of the federal government responsible for mail delivery (and sometimes telecommunications) between individuals and businesses in the United States
a children's game in which kisses are exchanged for pretended letters
A place (building, office, shop, or counter) concerned with the business of delivering letters, post or mail and selling stamps, etc.