[] a place where you can buy stamps, send letters, etc.邮局◆Where's the main post office?邮政总局在哪儿？◆post office branches邮政分局◆a post office counter邮局柜台the Post Office [] ( PO) the national organization in many countries that is responsible for collecting and delivering letters, etc.邮政部门；邮政系统◆He works for the Post Office.他在邮政部门工作。