What does 高校 mean?
高校 is a Japanese noun meaning “high school, senior high school” in English. It is written as 高校 in kanji, こうこう in hiragana, and koukou in romaji. This word is part of JLPT N4 vocabulary.
Example sentence
トムは高校の後輩です。
Tom and I went to the same high school. He was a year behind me.