Definition of "post office"

post office

/ˈpəʊst ˌɒfɪs/

noun
countable and uncountable, plural post offices
1. (countable) A place (building, office, shop, or counter) concerned with the business of delivering letters, post or mail and selling stamps, etc.
2. (countable) An organisation that delivers letters.
  Quotations
  “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!”
  1815, Jane Austen, Emma, volume II, chapter 16
3. (Canada, US, uncountable) A party game involving the exchange of kisses.