- 1[countable] a place where you can buy stamps, mail letters, etc. Where's the main post office? You can buy your stamps at the post office. a post office counter
- 2the Post Office [singular] (abbreviation PO) the national organization in many countries that is responsible for collecting and delivering mail He works for the Post Office.
- 3[uncountable] a children's game in which imaginary letters are exchanged for kisses
Check pronunciation: post office