public school noun definition in Types of school topic from the Oxford Advanced Learner's Dictionary

public school

 noun: Types of school topic
1 (in Britain, especially in England) a private school for young people between the ages of 13 and 18, whose parents pay for their education. The students often live at the school while they are studying. He was educated at (a) public school.2 public school (in the US, Australia, Scotland and other countries) a free local school paid for by the government