（尤指私立学校的）校友领带a tie worn by former students of a particular school, especially a private one
2.
[sing]
（私立学校校友间的）相互关照，校友情谊，共有的思想观念used to refer to the fact of men who went to the same private school using their influence to help each other at work or socially, and to the traditional attitudes they share